Jake Gyllenhaal, Hungry and Ready to Mingle

All the single folks come together at the Weinstein Company pre-Oscar party

The Oscar festivities may come to a close tonight, but L.A. certainly has been partying like crazy this week.

Aside from a few celeb pit stops at the Night Before Party at the Beverly Hills Hotel, the Weinstein Pre-Oscar party was the place to be last night, as the studio celebrated their nominated films like Inglourious Basterds, Nine and A Single Man.

Quentin Tarantino seemed to be honoree of the night as everyone wanted a piece of the director, but the partyer who most caught our eye was Awful Truth fave Jake Gyllenhaal…who was seen chatting up another quasi-famous face for part of the night…

Jake and Olivia Munn (Chris Pine's ex gf) were speaking closely inside Soho House for part of the night, but we don't see a romance brewing quite yet for these two.

"It looked totally innocent," says an eyewitness at the shindig. "They hung for a while, but Jake was overheard telling people he was just at the party to have a good time with his friends."

We're told the once Oscar golden boy was "smiling all night" as he perused the Hollywood crowd. We just love single (and happy) Jakey, don't you?!

Still, don't count the tabloids out for prematurely naming Gyllenhaal and Munn Hollywood's new couple!

Another stud on the prowl—we told you he so wasn't dating Jen Aniston—was Gerard Butler who was putting his best game forward chatting up a pretty young thang.

"Gerard was talking with a young blonde who later revealed she had a boyfriend," an eyewitness tells E!, stressing Butler's disappointment afterward.

Still, the yummy Scot was looking rather svelte in his suit and didn't let one misfire hinder his Oscar swagger.

"Everyone was just having a great time," our source says of the celeb attendees enjoying Soho House's 360-degree views of Los Angeles, not to mention trays of champagne, a meat-and-cheese bar and hamburger sliders.

Other guests at the soiree included Jamie Foxx, Leonardo DiCaprio, Bar Refaeli, Russell Brand, Russell Simmons, Kate Bosworth, Rachel Zoe, Nicole Richie, Joel Madden, Gwen Stefani, Sofia Vergara, Colin Firth, Ryan Gosling, Kevin Connolly and Kelly Osbourne...just to name a few.

While the shindig seemed to be a celeb flirt-for-all, there were a few couples seeming to be as strong as ever.

Despite Russell Brand being on the party circuit two nights in a row sans fiancée Katy Perry, the oddly sexy Brit was on his best behavior.

"He had girls coming up and talking to him all night," dishes our inside eyes. "He was nice and was talking up a group of girls for a while, but when they offered to grab him a drink from the bar, Russell declined, saying he was sober."

And yes…sorry ladies, but despite little PDA between the two, it appears Leo and Bar are totally back together, as the twosome happily chatted quietly together throughout the night.

"Leo was wearing a baseball cap and it seemed like he wanted to be incognito," an eyewitness tells E! News. "He hung closely to Bar and was also surrounded by a group of guy friends, including Kevin Connolly."

Damn…a girl who can chill with the guys? That's Leo's dream! Looks like the notorious bachelor may be off the market sooner than we think.