To say that everyone at Giambattista Valli's dinner at Caviar Kaspia was excited to finally let their hair down after a month of shows would be an understatement. During dinner—co-hosted by Moncler, where he designs the Gamme Rouge collection—Valli found himself dancing on tables, tossing cherry vodka shots down the banquettes to his friends, and asking his girls to shuffle their legs to let other dinner guests crawl under the table. "Ah, but c'mon, now is the time to celebrate," Valli smiled, as he projected his face on the wall via a customized lighter with a flashlight on the bottom. "I have about one night to celebrate before it's back to work."

He wasn't kidding: Sitting directly across from him was Charlotte Dellal, the shoe designer for whom Valli is designing a summer wedding dress—and with whom he had scheduled a fitting the next day. "But Giamba, let's not do a fitting tomorrow. I've eaten too much," Dellal protested, looking at a baked potato that had been strip-mined for its caviar. Not that all the toasting was fashion-related; next to Dellal was Elettra Wiedemann, who had just finished her master's thesis on vertical farming. "What's that?" Valli asked. But before Wiedemann could fully explain her idea to build farms in metropolitan centers, it was time for another shot: "To vertical farming!"

Over at the Pavillion Ledoyen, meanwhile, Spike Jonze screened one of his newest shorts for Jefferson Hack's Dazed & Confused party. With so many obligations, much of the fashion flock got there on the late side, effectively forfeiting their moments with the filmmaker and the English publisher (they disappeared early, never to be seen again!). Not that this did anything to discourage lingering: "I'm going to have a cocktail," Leigh Lezark said. "We're off the clock now." She was right: With all the models, editors, DJs, and other fashion professionals done for the season, not to mention the rest of Parisian youth up for a good night, the Dazed party was loud and it was good: In fact, it ended at a sunrise-scary 5 a.m. "See you next season!" Lou Doillon, who had hustled a group into her caravan, cried out into the Paris night.

— Derek Blasberg