11/16/2009 at 04:00 PM EST
An "adorable" Lauren Conrad
joined pal Frankie Delgado
at his table during a night out at Voyeur in L.A. Surrounded by female friends, the former Hills
starlet drank a few glasses of champagne as she laughed and people-watched all night. Conrad was also busy on her BlackBerry, sitting down low and trying to remain low-key. Delgado, meanwhile, was wilder, pouring vodka right into his friends' mouths. The club promoter was the life of the party, entertaining his friends while Conrad snuck off before 1 a.m. Also at Voyeur that night: Lindsay Lohan
, who continued her partying binge.
Though her fiancé was close by, Melissa Rycroft
wanted nothing to do with him while partying at Lavo in Las Vegas. That's because the reality star was at her bachelorette party, while Tye Strickland
celebrated with a bachelor bash of his own at Tao. "I don't even want to know what he's doing over there," Rycroft told us, as she danced and took shots with pals during her long night out. Turns out, Strickland started his night at the musical Phantom of the Opera
, then headed to Tao, where he hung out with seven pals and sipped beer and vodka at his VIP table.
, taking his kids Oscar
, bowling at New York's Lucky Strike Lanes and Lounge. The actor taught his kids how to bowl and also hung out with Vincent D'Onofrio
, who was there too.
After launching her jewelry line Grayce on the Home Shopping Network, Molly Sims
celebrated privately with her family at the Postcard Inn on the Beach in St. Petersburg, Fla., before dressing up to host the hotel's opening party. Later, the actress joined her family for wine, margaritas and a bite to eat inside Wildwood BBQ & Burger.
and Christian Siriano
got a sneak peek at the new Jimmy Choo for H&M collection alongside fashion industry insiders at the H&M store on Fifth Avenue in New York.
By JENNIFER GARCIA, MARK GRAY, MELISSA LIEBLING-GOLDBERG and LESLEY MESSERMonday's Caught in the Act >