I eat the Varsity at least once every time I'm in town. Usually bring 8 or 12 chili dogs home with me too. Just get anything with chili and you're fine.
The Vortex has the best burgers in town.
Papa Deaux's is a great seafood/cajun chain that isn't around here. There's a couple in ATL. Solid every time I've been there.
Sidelines on Roswell road is a good bar outside the city. Lots of pool tables, mega touchs, video games, beer, and a batting cage.
If you ever need a cheap room in ATL, you can priceline your own price and get the Marietta Hyatt for $35. Been doing this one for years. All suits, so your room is 2 rooms with tvs in each. Hotel is right off Windy Hill exit on 75, about 15 min from I-75/85 merge. (priceline, select only Marietta, 3-stars, $35 and 9 times out of 10 you'll be accepted at the Hyatt)