Sarah Silverman goes where others fear to tread, performing take-no-prisoners standup routines that regularly make audiences split their sides (or struggle to hold down their food, depending on the subject matter). Tonight, the tart-tongued Jewess steps away from the second season of her Showtime series for a charitable gig. The Troubadour's South Toward Home Benefit Concert helps repair and rebuild the Gulf Coast. Joining Silverman is local indie-rock outfit Foreign Born, performance weirdos Tim and Eric, and Reno 911's shorts-wearing funnyman Thomas Lennon.