Welcome to Atlanta
There are some local clubs in Atlanta. One is call the reef dwellers. I think that if you do a google search, you can find them. There are a lot of members, and they have lots of group trips.
If you are interested in DIR and GUE, we also have a club in Atlanta. You can PM me if you are interested in information on that.
The Birmingham club is very diverse, active, and has a strong environmental conscience. If you are interested in that club, (yes, I am the Atlanta member that divebomb is referring too!) you can check out their website, or PM me for more info.