Sad to hear that the Gershwin Hotel (7 East 27th Street) will soon be changing management companies. On the other hand, we're happy to report that there's a "last big party bash" on Saturday night, December 15th, starting around 8 p.m. and the theme is "Christmas With Andy." The party is in honor of the Met's "Regarding Warhol" exhibit and two books: Thank You Andy Warhol by Catherine Johnson and Andy Warhol's New York by Thomas Kiedrowski. Look for a Billy Name photo exhibit curated by Dagon James, Warhol films, Campbell's Soup ornaments and music from DJ Tennessee ("disco-era Studio 54 music") and DJ De Flame. Plus "Andy Santa will be serving Christmas cocktails." The best news? Admission is free