If you’re into Olympic lifting, strongman or powerlifting then I would recommend Coffee’s Gym in Marietta. For bodybuilding there is a place called Ropeman’s Fitness. It’s on Buford Highway in Doraville (North Atlanta).
This place used to be called Main Event Fitness in the early 90’s and was owned by Lex Lugar and Sting (TV wrestlers). Tyrone Felder, Lee Haney’s training partner, used to come to Main Event and train people.
Tyrone is called “Ropeman” because of his shredded look (at least that is what I was told). Ropeman has bought the place and I hear now it’s strictly bodybuilding.