11/02/2009 at 03:00 PM EST
A peppy Mary-Kate Olsen
ventured out to West Hollywood's Chateau Marmont for a relaxed night out with a girlfriend. The starlet rocked her usual boho-chic look, sporting a long dress and vintage purse as the twosome hung out on the back patio. Olsen was so low-key, she stayed put in her chair, just chatting before taking off around 11 p.m.
In Vancouver, Bradley Cooper
grabbed a late-night dinner sans Renée Zellweger
at Joe Fortes Seafood and Chop House. The actor, who's filming The A-Team
in town, arrived with four friends for his steak dinner – with a side of steamed spinach and mushrooms – at 10:30 p.m. "Bradley was very focused on his company and was very sweet when he left," a source says, adding that the group sat deep in conversation throughout their two-hour dinner.
Before serving as the grand marshal for Key West, Fla.'s Halloween parade, Girls Next Door
star Bridget Marquardt
celebrated her boyfriend Nicholas Carpenter
's 30th birthday with a romantic dinner at Scarpetta in South Beach's Fontainebleau resort. "They were all over each other at dinner, looking into the other's eyes," says a source at the restaurant. "They were even feeding each other dinner!" Later, the two moved the party over to the LIV nightclub.
Mary J. Blige
teamed up with Taraji P. Henson
for Coco de Ville's Mischief Night 2009 bash in West Hollywood. The trio arrived together and stayed close throughout the night, sipping cocktails, "mingling and genuinely just having a good time," a fellow partygoer tells us.
and actor Geoff Stults
may have gone to L.A.'s Crown Bar together, but the longtime couple didn't spend much time hanging out with each other at the nightspot. Instead, Stults sat at pal Mark Cuban
's table, while Keibler laughed it up with her friends, sticking close to the bar. The pair stayed out until last call before leaving together.
By JENNIFER GARCIA, CHRISTINE KILPATRICK, LINDA MARX and EUNICE OHMonday's Couples Watch >