Comedian Russell Peters is supposedly renowned for his "quick wit and piercing mimicry," which sounds kinda cool until you remember that the same thing used to be said about Robin Williams, who now is starring in a movie whose title, RV, is also its premise. Not exactly a high-concept alert, a la Mrs. Doubtfire, but at least Williams has stopped trying to get others to take him seriously. One Hour Photo anyone? In any case, if you catch Russell Peters this weekend and he makes a few funny movies and then hits a decade-long tailspin, well, at least you can say you saw him when he was cool. Russell Peters plays the Majestic Theatre, 1925 Elm St., 8 p.m. Thursday. Tickets are $34.50. Call 214-373-8000 or visit liveatthemajestic.com. Thu., May 18, 8 p.m.