Bob Colacello's party photographs from the 1970s-when the reporter edited Andy Warhol's Interview magazine and chronicled New York's social scene-are strangely poignant. To think that immortal Chelsea boy Calvin Klein (top) was once so debonair! Grizzled mogul Barry Diller (pictured with Diane von Furstenberg then and now) had such a seductively wicked smile. It's hard to imagine Vogue's André Leon Talley (pictured next to Studio 54's Steve Rubell and Warhol) as anything other than the imposing African cardinal he plays on the red carpet. And then one remembers that today's socialites will one day appear equally ludicrous to the generation that comes after them, evidence that they were ever young buried in Patrick McMullan's photo database.