I've started teaching a rolling improv workshop at a local member's only theatre in Atlanta.
The Yes, And... Improv Workshop focuses on a different topic each week, and is designed so that no matter how much or little experience you have in improv, you can always come in, learn something, and most importantly, have fun.
You can find info about the workshop at its Facebook page. It's relatively new (at the time of posting), but hopefully it'll keep going for a long time!
To this point we've covered topics like status, physicality, characters, and basic rules of improv. If you live in the Atlanta area, please come down and check it out!
You can find out more about Mixdeity by heading over to their website.