You probably know CAROLINE RHEA (pictured) from her extensive list of television credits, but her roots are still the stage, a stool, a spotlight and a microphone. Now the host of NBC's "The Biggest Loser," Rhea -- in Atlanta Fri.-Sat., JAN. 19-20 -- has also been a regular on "Hollywood Squares," and made appearances on "The Drew Carey Show" and HBO's "Curb Your Enthusiasm." Her stand-up is a lot of single-and-bitter-about-it female humor, but you don't need to be a woman or single to laugh at her ... I mean with her. $22.50. Fri., 8 and 10 p.m.; Sat., 7 and 9 p.m. The Punchline, 280 Hilderbrand Drive. 404-252-5233. www.punchline.com.