What’s now called “Anna’s Party,” the annual benefit at the Metropolitan Museum for its Costume Institute, held last night, was once a society party, but now, chaired by Vogue editor Anna Wintour, it’s become a celebrated celebrity petting zoo. According to the New York Times report, social leaders like Annette de la Renta and Jayne Wrightsman chose to enter through a service door rather than walk the red carpet with the Hollywood types who now dominate the night. If you wanted to see media power last night, the place to be was at “Leo’s Party” on West 57th Street at the Osborne apartment of the late Leo Lerman — the longtime eminence gris of Vogue — and his lifelong companion Gray Foy, where there was a celebration of the publication of The Grand Surprise: The Journals of Leo Lerman. In the crowd were Tina Brown, Nancy Novogrod, Amy Gross, Grace Mirabella, Paige Rense, Ruth Reichel, Alexandra Schlesinger, Richard Meier, Victoria, Donald and Sue Newhouse, Patricia Neal, Marian Seldes, Marit Gruson, Steve Martin, Peter Beard and Shelley Wanger. And where, you might ask, was society? New York Social Diary found at least some of it at a Literacy Partners party. Proof, if such is needed, that New York has enough boldfaced names of its own to go around.