In much of the US, a club can offer full nudity or serve alcohol but not both, which is why so many full-nude clubs elsewhere are alcohol-free and admit 18-year-olds (how strip clubs work). Inside the City of Atlanta, Magic City, the Cheetah and Blue Flame all state on their own websites that they are fully nude and serve a full bar, and so does Strokers in Clarkston. Those clubs publish a 21+ entry age.
The suburbs are different. Several metro governments restrict nude dancing where alcohol is sold, modelling their rules on DeKalb and Fulton counties, Sandy Springs, Johns Creek and Doraville (Rough Draft Atlanta, 2013). Brookhaven's ordinance bars sexually oriented businesses from selling alcohol and requires dancers not to fully undress (AJC), which is why the Pink Pony's rules have changed over the years. Check a suburban club's own policy before you go.