Atlanta Chowhound Dining Club ?
I see in messages that there are some members that get together for dinner, but is there something organized or just impromptu ? My wife and I dine alone most times because our friends like Macaroni Grill and PF Chang's. It would be nice for example to have Dim Sum with more than 2 people at a table. China Delight has at times been as good as Dim Sum in Vancouver BC I've had. (I used to be able to drive there ...sniff). I looked at AIWF.org but it is $75 to join and I like Buford Hwy options in addition to high-end intown locales AIWF frequents.
Since you have not gotten any repiles on CH yet:
I don't know of anything formal that exists, but you should take a look at the "Atlanta Cuisine" website for their local gatherings, or post there to start your own. You may find some kindred spirits. There is often a lot of "hey, I was there at the same time" kind of posting and folks are generally pretty open and friendly.
I bet you could easily arrange a dim sum outing.