Caught in the Act

You'll Never Guess Who Joined Robert Pattinson for Drinks

UPDATED 11/29/2012 at 12:15 PM EST • Originally published 11/28/2012 at 05:30 PM EST

With his Twilight duties behind him, Robert Pattinson enjoyed a night out with a male pal on Tuesday. The two met up at West Hollywood's Chateau Marmont, where Pattinson grabbed a table and sipped on a Stella.

Not long after their arrival, though, the men were joined by a group of friends – including singer M.I.A., who capped off her signature eclectic look with an oversized hat.

Pattinson, in a jacket (but not his usual baseball cap), "looked happy and relaxed," a source tells PEOPLE. Though he frequently left his pals for breaks on the smoking patio, "he only paid attention to his guy friends, laughing and letting loose a little bit," the source continues. After about an hour, the whole party said goodbye and left the venue. – Jennifer Garcia

Spot a celebrity? Tweet us your sighting @peoplemag with #CITA and it could appear on PEOPLE.com!

— People magazine (@peoplemag) August 7, 2012

NEXT: Diddy, Kanye, Fat Joe Delight Miami Clubgoers with Surprise Concert