Dad’s Garage lists its Community Jam for Tuesday, October 27, from 8 to 9 p.m., with performer signups beginning at 7 p.m. It is free and open to people who want to try improv as well as those who only want to watch.
This is a more participatory night than buying a concert ticket. You can walk in, see how experienced improvisers handle a prompt and decide whether to get on stage yourself. The downside is minimal: an hour and a little social courage.
The venue is at 569 Ezzard Street SE in Old Fourth Ward. Check its event page for any last-minute changes, and arrive early only if you want a place in the signup queue.
Go at 7 p.m. if you want to perform or at 8 p.m. to watch; the venue explicitly says admission is free.