There was ample reason to celebrate at 31 rue Cambon last night. The space—Coco Chanel's storied apartment—was the destination for Karl Lagerfeld fans after that morning's Chanel show, but virgin copies of Another Fashion Book, the first of three glossy tomes from Another Magazine founder Jefferson Hack to be published by Lagerfeld's Edition 7L, were also on hand to be fêted.

As Mark Ronson deejayed, Coco's prized artifacts—from quilted pillows to the designer's thick-as-bottles glasses—were admired by guests like Charlotte Casiraghi and Dasha Zhukova. By the middle of the party, a more contemporary article of fascination joined the display: Kate Moss, who had earlier made her sole front-row appearance of the season at Chanel.

"Chanel would very often have the most important people in her life to this apartment until the late hours of the night," Lagerfeld said from the sitting room, where Stefano Pilati and Lily Allen were taking it all in. "But she would never sleep here." As Moss did on this night, Coco would cross the street to the Ritz and retire to her suite there.

While the space wasn't new to chic gatherings, we're not sure if Coco's posse would have been familiar with Budweiser beer, which took over as the drink of choice when the bubbly ran out. "Now that's a good-time girl," Hack said of one well-heeled attendee who, bottle in one hand and a smoke in the other, was grooving to Donna Summer.

— Derek Blasberg