The billionaire Jeff Bezos sat inside the Polo Lounge at the Beverly Hills Hotel on Saturday night with his fiancée, Lauren Sanchez, who carried a silver purse in the shape of a spaceship.

Earlier that week Mr. Bezos, who owns The Washington Post, had made news for pushing the paper’s opinion section to embrace “personal liberties and free markets.” The section’s editor resigned in response. If that was weighing on him, you’d never have known by the convivial rapport he shared with Kim Kardashian.

Both were guests at a pre-Oscars dinner hosted by Chanel and Charles Finch. Ms. Kardashian used a metal fork to pry open a handbag that was roughly the size of an AirPods case. She removed a Ricola lozenge, popped it in her mouth and returned to her conversation with Mr. Bezos.

The room’s perimeter was reserved for entertainment royalty. Mick Jagger nudged pink cotton candy floss off his dessert sundae with a spoon. Al Pacino held court in one corner, leaning across the table for an animated discussion with Jeff Goldblum.

In the days leading up to the Oscars, stars wound through an annual succession of events hosted by fashion labels and agencies eager to capitalize on Hollywood’s biggest weekend.

“It’s a fantasy, magical world,” the actress Lupita Nyong’o said. “It’s nice to escape into that sometimes.”