It’s a Paris first: Two designers are co-hosting a dinner after their shows on Saturday. Gianni Versace and Karl Lagerfeld have invited a small group of guests to dine in Karl’s house.

Barbra Streisand and Donna Karan aren’t just good friends, they’re collaborators as well. The costumes for Barbra’s big Las Vegas show on New Year’s Eve were credited in the program to BSDK, which stands for Barbra Streisand/Donna Karan.

Maybe Julie Baumgold gave her seat to someone else, or maybe she just wanted to be closer to her husband, Esquire editor Ed Kosner. Whatever the case, Baumgold was perched on Kosner’s lap throughout Gianfranco Ferre’s men’s wear show in Milan Tuesday.

If New Year’s Eve wasn’t everything you hoped for, one can always try it again on Wed., Feb. 9. That’s when Ross Bleckner, Carla Fendi, Michael Gould, Robert Phillips and B.D. Wong will ring in the Chinese New Year with a benefit for the Community Research Initiative on AIDS. Actress Joan Chen and “Wedding Banquet” director Ang Lee will be honored, and Fendi will introduce its newest scent, Asja.

The late Swifty Lazar, king of the Hollywood deal, was remembered by New York friends the other night, when Lauren Bacall had 10 people or so to her apartment for an intimate memorial service. Arthur and Alexandra Schlesinger, Joni Evans, Kenneth Jay Lane, Phyllis Newman and Adolph Green, Kitty Carlisle Hart, Betty Comden and Karen Lerner all came to trade barbs and stories about the diminutive titan’s bravado. Bacall herself debunked the popularly held idea that it was her former husband Humphrey Bogart who had given Irving Lazar the nickname that so irked him. She didn’t say how Lazar did get it, but insisted it wasn’t Bogey. Bacall recorded the proceedings for posterity.