• WATER benefit for Riverkeeper. SF Gallery, 663 Fifth Ave., nr. 52nd St., 6:30 p.m. Sponsored by Salvatore Ferragamo; expected guests include Lorraine Bracco, Ivanka Trump, Lauren Bush, Amanda Hearst, Vanessa Q. Rockefeller, Ana Lucia Vanderbilt, Chupacabra Winthrop-Gugelman, and Mo’nique Astor.

• VH1 party for The Agency. Bryant Park Hotel, 40 W. 40th St., nr. Sixth Ave., 9 p.m. No hugely celebtastic guests are confirmed, but “The Agency” is the Wilhelmina modeling agency, so you can probably count on Piven to be there.

Or, check out our Agenda listings for tonight, selected by New York's culture editors.