A veteran of Comedy Central's "Premium Blend" and Montreal's famed Just for Laughs Festival, comedian GREG MORTON is most well-known for his witty, two-minute round-up of the entire Star Wars narrative. He's also a talented impressionist, mimicking celebs ranging from Macy Gray to Barry White. Morton performs Thurs.-Sun., AUG. 2-5, at the Punchline. $17.50-$19.50. Thurs., 8 p.m.; Fri., 8 and 10 p.m.; Sat., 7 and 9 p.m.; Sun., 8 p.m. 280 Hilderbrand Drive. 404-252-5233. www.punchline.com.