If you're in Atlanta, make sure to grab a burger at local legend The Varsity.
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Seriously though, i would never recommend that to anyone. A couple of really great local burger chains are Grindhouse Killer Burgers and Yeah! Burger.
Used to be able to find the occasional Fatburger or Fuddruckers around which were both pretty good, but haven't seen any in awhile. Don't particularly care for any of the national chains we have now.