Cerebral palsy is not funny. That is, unless comedian JOSH BLUE makes it funny by using his illness to inspire material, like when he notes that his mom is the only person who can tell when he's drunk: "Josh, are you walking straighter?" The season four winner of NBC's "Last Comic Standing" has been a sell-out headliner ever since a national audience got a taste of his off-kilter sense of humor. Blue will be at the Punchline for three nights, Thurs.-Fri, FEB. 5-7. $20-$25. Thurs., 8 p.m.; Fri., 8 and 10 p.m.; Sat., 7 and 9 p.m. 280 Hilderbrand Drive. 404-252-5233. www.punchline.com.