There’s a fine line between being selfish and smug and playing someone who’s selfish and smug–and Bob Kulhan crosses it many times in this sometimes hilarious, sometimes just plain awful comedy show. As its writer and director and the star of most of the sketches, he proves again and again the truth of the Martin Short/Jiminy Glick Theorem: you can’t continue to get laughs just doing the same bit. In Kulhan’s case it’s impersonating his conceited, no-talent showbiz alter ego, Shecky, who acts as emcee and appears in some of the most abysmal sketches, including one in which he plays a ventriloquist with a severely burned, severely depressed dummy. Kulhan is backed by an ensemble of actors and a few musicians, none of whom gets enough stage time. This guy needs to have someone rein him in. Through 6/16: Thu 8 PM. ImprovOlympic, 3541 N. Clark, 773-880-0199. $12.