Brewpubs:
If you're heading downtown any, Max Lagers is a good brewpub. There's also a Gordon Biersch, and Park Tavern is usually good. There is a 5 Seasons near where you'll be, but its on the pricey side. Good brew though. The head brewer at the location nearest you is one of the co-founders of Sweetwater Brewing company.
Bars:
I don't have anything to offer here besides Taco Mac, as I don't frequent bars. Taco Mac has a great selection of beers. They usually either have a ton on tap, or a ton on draft, depending on the location. There are two near me, one has 300+ in bottles and 50 on draft, the other has 150 on draft and 200 in bottles. The one closest to where you'll be is probably the Perimeter Place location. It has 100 on draft and 280+ in bottle.
http://tacomac.com/locations_ga.html
Breweries:
You'll be near the Sweetwater brewery. Their IPA is one of my favorite beers, and the 420 is their top seller (extra pale ale). They do tours and tastings W-F from 5:30 until everyone goes home, and from 2:30 - 4:30 on Saturday. Atlanta Brewing Company is worth a visit and not too far away, but Terrapin (in Athens) would be a bit of a drive.
LHBS:
If you have time, stop by Brewmaster's Warehouse, Ed loves to meet members. Its in Marietta, not far from where you'll be.