• RSVP to Help benefit. Tribeca Rooftop, 2 Desbrosses St., nr. Hudson St., 7:30 p.m. The red-hot scheduled-guest list includes Bill Clinton, Al Gore, Joe Torre, Elton John, Lewis Black, and Jon Bon Jovi. We respected JBJ before in a somewhat patronizing way, but since we started doing karaoke more, our respect is complete and sincere. "Livin' on a Prayer" is tough to sing when you don't have the rest of the frat party backing you up.
• Gilda's Club New York gala. Pierre Hotel, 2. E. 61st St., nr. Fifth Ave., 6:30 p.m. Expected guests include Gene Wilder, Mandy Patinkin, and Joel Siegel, who calls this gala "a popcorn-munching thrill ride for the entire family."
Or check out all our Agenda listings for tonight, selected by New York's culture editors.