Renowned for his quirky Christopher Walken impersonations, comedian KEVIN POLLAK has gained notoriety for his dramatic career working alongside A-list celebrities in films such as Casino and Hostage. Appearing in more than 50 films, numerous television projects and various comedic programs, including Comedy Central's "Roast of William Shatner," Pollak brings his diverse brand of humor to the Punchline Comedy Club. $25. Fri., 8 and 10 p.m.; Sat., 7, 9 and 11 p.m. 280 Hilderbrand Drive. 404-252-5233. www.punchline.com.