Aniston, 39, and Mayer, 30, and three pals arrived late Tuesday night at the Sunset Tower Hotel for dinner at the Tower Bar, where Aniston nibbled on a grilled chicken salad while chatting with the group.
“They left out the back of the hotel and were very discreet,” says a source. “Jen was leading but John walked very closely behind her when they left.”
Earlier in the evening, Aniston – sans Mayer – supported pal Courteney Cox Arquette at the Glamour Reel Moments premiere.
• Reporting by PERNILLA CEDENHEIM