What are the opening hours?

Tuesday 7pm - 10pm Sunday 7pm - 10pm

Arch Reactor

A hackerspace in St. Louis for artistic, technical, and educational pursuits. Arch Reactor :
1. A hackerspace (or makerspace) based in St. Louis.
2.

A workshop combined with a meeting space where people of similar interests or skills can converge to create, modify, learn, talk and build. At least, that's what we strive to be. Wikipedia has a more in-depth explanation of hackerspaces, if you'd like. Our workshop provides several tools that you might not be able to afford on your own, as well as short-term storage for your projects. Our meeting

area, equipped with a projector, white board wall, and a wide assortment of seating, allows us to hold classes, meetings, and other events in comfort. Naturally, we also have fast, free Internet access. We hold weekly meetings every Tuesday that are open to the public, so feel free to stop by and check us out!

05/17/2026

this last Tuesday we had a great turn out for our Open house.. Gave a bunch of tours and Enjoyed some food off the grill. Thank you to everyone that made it out. :)

That said We always have a ton of new things on our Calendar.

things like :
● CAD Meet up and study every Sunday
-- we talk about and make things using CAD software. From newbie to seasoned pro, all are welcome to share, learn and collaborate.

● Friday Fire - 05/22
-- Its a Fire on Friday We’ll bring a fire and you bring a chair. Social gathering to enjoy company around a fire.

● 3D Printer Meetup - 05/22
-- Whether you're interested in printing for art, prototyping, manufacturing, or just fixing dishwasher soap lids, this is a a great place to meet other folks in the Hobby.

● Boffer Sword Build Night - 05/27 - 5$ Cost
-- Come on out to Arch Reactor and build foam swords. We have plenty of Open table space to take advantage of for the evening.

● AR Board Game Day - 05/30
-- Come On Out, see the space, and Play games With us. If you don't know games that's OK we are friendly and love to teach. If you do, bring your Favorites along and lets get a Game in.

And this is just the next few weeks.. Check out our Calendar For Full Details and more events :)

05/08/2026

One last call for this

May 12 Starting at 5 pm --- BBQ Grill and Open House!

If you have been thinking about checking the space out here is a great chance to do it and grab some dinner while you are at it. We welcome you to share our space and find out who and what we are. We will have a few of the machines running to show off.. there will be Members around that can answer questions and chat with.

AR Will Provide Burgers and Hot Dogs on the Grill, along with an Assortment of Bagged Chips and Potato salad.

And in true maker Fashion Desert is looking to Liquid Nitrogen Ice Cream. 🎉 while it lasts.

04/03/2026

Looking for something to do this beautiful weekend? Well AR has a few things on the calendar.

2600 Meet-up :
Tonight we are hosting a local 2600 meet-up. Tech folks all they discuss ranging from AI to Facial Recognition to Lock Picking to Info_sec ;)

Find out more about tonight here :
https://www.meetup.com/st-louis-2600/events/313137165

Takeout & Hangout :
Tomorrow (Sat Apr. 4th) is a Monthly meet-up of folks looking enjoy a night out without all the troubles of going out to eat ;) .. No parking fees, no waiting for a table, no loud room to talk over, and even maybe the opportunity to try a new place out.

Grab some food from somewhere, or make some and bring it on out. Enjoy a couple hour of conversation with plenty of room to spread out. Maybe bring some extra to share. Doors open at 7pm and we’ll be around until 9pm(ish)

STL CAD Study Meet-up:
Starting at 1pm on Sunday (Apr 5th) Kho hosts one of our newest meet-ups focusing on helping folks learn and use CAD software. This is a great opportunity to brush up on skills, learn a new one, or just have folks handy while you are working on a project just incase you get stuck

Sunday open house :
Starting at 7p we have our weekly open house. If you have never been in, wanna check the space out, or just have general questions and want to do it in person this is the time for you.

We ask a full member to hang out from 7p-10p to do those duties. In addition the membership at the Supporting level can count on this being 3 full hours they can come in and work on projects.

01/25/2026

Due to the extreme weather and road conditions. We are canceling our of normal Sunday night open house.

Please be careful out on the roads if you choose to go out.

11/25/2025

Christmas and other various wreaths at Arch Reactor! Thanks to everyone who attended, great work all around.

11/17/2025

Coming in to the latter half of Nov. We have several of our more Public events inbound...

(This) Friday NOV 21
3d Printer Meet-up -- Come out and hang out. Learn about 3D Printers and if you are new then you can chat with other owner to get the heads up on what to look for or look out for.

Friday Fire -- Hosted in the back parking lot of the Building. it is just what it sound like. We will have a fire pit and hang out around it. :) Smores can generally be found if you look hard enough.

we take a week off for Celebrating and then

Dec 5th
The 2600 Group meeting happens on the first Friday of each month. Security and Tech Focused this is a great group of folks. This months Focus : Blue Teaming / Defense on a budget

DEC 6th
the return of "Takeout Hangout"
( https://www.facebook.com/share/1Z8hiSbLqS/ ) -- where everyone grabs food out or brings food or just comes to hang out and enjoy time out that isn't a super buy restaurant, waiting for a table dealing with noise. we had 15 people last month and are looking forward to this month.

There are other events as well Check out our calendar for more information on these events an others.
https://archreactor.org/calendar/

11/12/2025

We Love to celebrate the things Our Members Create and do, even out in the "real" world.

Participating in and then winning People’s Choice Award would qualify :)

Recently we had several members participate in Perennial's ( http://perennialstl.org ) annual Redesign Showcase. Where teams are given an item sourced from St louis alleys. They are encouraged to re-use as much as possible to remake the item into something new or unique. Items are then auctioned off as a Fundraiser

More info for this year is here :
https://perennialstl.org/event/redesign-showcase/

I Borrowed a short part of the write up from team member Chris B. :
*************
“Gladys” is a games cabinet that used to be a sewing machine table. I designed and created her with a team from Arch Reactor. (My amazing team mates were Beth K., Diane S., and Kim S.) The new cabinet features a small footprint (13″x17″), flip top access to a larger surface, storage area including movable storage, built in flippable game boards, all game pieces and rules, original and remixed details from the original.

Check out this video for a quick tour.
https://youtu.be/hhl9ZWsCF5E?si=8dYi4bEH5j9azkpf
*************

A more Full Write up can been seen on Chris’s website here :
https://bettencourtart.com/gladys-retires-to-game-with-friends/

if you would like to know more about our Community or our place please feel free to reach out, just come on by when something on our calendar interests you. we'll be happy to show you around

11/10/2025

What did you do this weekend?

Some 12 of our members banded together to go out and face the elements of nature and *Gasp* Very little internet access While Camping down in Johnson's Shut-Ins State Park.

Fire / Food / even some rock climbing / hanging out enjoying nature A great time was had by all :)

We are not only a shop with tools :) We do have some community focused events for members to participate in. In support of this, leading up to the event there was an outdoorsy class offered and plenty of discussion on what to bring out for those coming out :)

Check out our Calendar For events that might interest you :)
https://archreactor.org/calendar/

10/31/2025

Looking for something to do this weekend, come out and hang out with us 😜

Takeout & Hangout is this weekend. It's our first time for this event so we are looking forward to seeing folks

10/09/2025

Hey Folks, it’s a busy month here at Arch Reactor. We have three different social events we wanna invite folks to.

On Sat. Oct 11th. starting at 5pm.
Our AR 16th Birthday Party is where you should be. We’ll have cake and a few activities going on. Come out and help us celebrate being the oldest hackerspace in the St Louis region. You may even hear a tale from one of the gray beards about the before times when 3d Printing wasn’t even a thing yet.
https://www.facebook.com/share/17SP2mbWvm/

On Fri. Oct 17th, Starting at 7pm
We host a monthly event Called Friday Fire. Folks hang out around the Fire pits. Generally there are s’mores and maybe other things and just enjoy the evening. Good Conversation, Good times.
https://www.facebook.com/share/1HbfSZ6822/

On Sat. Nov 1st, Starting at 7pm
We have a brand new Social event Called Takeout & Hangout. The Idea is to give folks a reason to go out grab food and have a place that isn’t just going back home. It’s an Opportunity to chat with new (or old) friends and just hang out. All the While not having to wait an hour for a table ;)
https://www.facebook.com/share/17FM3HGYEG/

There are plenty of other events that may interest you on our calendar, so give it a look and if it’s up your ally check it out.
https://archreactor.org/calendar/

09/27/2025

We are playing board games at Arch Reactor today until midnight ;)

Feel free to come play a game or check the space out... Currently three different games are going, with 13 gamers.

Address

2215 Scott Avenue
St. Louis, MO
63103

Opening Hours

Tuesday	7pm - 10pm
Sunday	7pm - 10pm

Telephone

+13145962531

Website

http://archreactor.org/

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