"How about a bad title?" wonders Spencer Kayden's Little Sally in "Too Much Exposition." "That could kill a show pretty good." It's a tribute to the skill deployed by the Urinetown creative team (Mark Hollman, music and lyrics; Greg Kotis, book and lyrics) that its title doesn't kill the show. Set in a near-future in which water depletion has led to a ban on private toilets, this may be the only musical in history in which one of the leads makes a fortune on pee. But the show (which originated Off-Broadway before graduating to the big league) limits its subversive intent to subject matter and is refreshingly classic in approach and structure--think Weill-meets-Lewis Carroll. Backed by a small ensemble, the cast (with John Cullum in a turn nothing short of brilliant as the evil urinal magnate) has a field day with Kotis and Hollman's frequently hilarious score. --Elisabeth Vincentelli