Xanadu slayed the critics when it hit Broadway with its arsenal of disco balls, frosted lips, roller skates, and stretch pants. Charles Isherwood of the New York Times called it "simultaneously indefensible and irresistible," and it won a pack of awards including a Tony nomination for best musical. Tonight's special performance will help slay the haters—every cent of the $99 VIP ticket price goes to Equal Rights Washington. Tickets include floor seating and an afterparty at Chapel hosted by Dan Savage with the Xanadu cast. (And if you can't make it tonight but still want to help, enter the ticket code "ERW" when you buy tickets and $5 will go to this indispensable advocacy organization.) (Paramount Theatre, 911 Pine St, thestranger.com/xanadutix. 7 pm, $99, 21+.)