We also did GM because it would be challenging to try Slack with our parents, considering some don’t even check email. While texting works, it doesn’t work for larger groups and GM makes it easier. Ultimately the students on the team 2 years ago were already using GM.
Signing up new students, we just have to keep at them. Invite them and remind them about it. I still see 1-2 have muted the main GM, so I may check with them in person.
GM seems to get unmanageable at scale, but with 4-5 active GMs it is okay. I also don’t mind to make a event specific one, just so the conversation is contained. My policy is post new GMs to the main GM, and don’t make private GMs for team stuff. I should take the 4-5 we have and permanently put their links somewhere (website, whiteboard, handbook) so anyone can join.
Right now we have a main GM, and then ones for CAD/design, programming, and leadership. I’ve long thought about a Meme/chat one, to clean up the main GM, but haven’t quite got to it. Ideally, you might keep a ‘announcements’ GM that everyone keeps unmuted. Everyone once in a while the main GM gets unruly, and with 50+ members that is a lot of unneeded messages.
We do have a curfew between 10pm and 6am, mostly for the main GM. I wish I could just set it up to be automatic.