ROBERT Pattinson has been out partying again. The actor was out with his friends on Oct. 25. Rob hit up the Chateau Marmont, and had a few lucky girls close to tears, as they rushed to Twitter to broadcast the celeb sighting, HollywoodLife speculated that Rob is hitting the bars of Los Angeles with the hope of bumping into ex Kristen Stewart, who returned to Los Angeles on Oct. 6. He was last at the Chateau on Oct. 18, to celebrate Zac Efron’s birthday, then spotted on Oct. 23 at The Viper Room, and on Oct. 25, model Annika Holtz uploaded her and Rob’s pic.–SP