It must have been quite an awkward night! Jennifer Aniston was out to dinner with her fiance, Justin Theroux and some friends. Drew Barrymore, Chelsea Handler and her boyfriend Andre Balazs were some of the friends joining them. Next thing you know, John Mayer walks in the door and is seated two tables away from Aniston and her friends. The pair started dating in 2008. They called it quits that summer but later reconciled, only to break up again in 2009. They were even spotted together at Summerfest when he played the Marcus Amphitheater. Nonetheless, the two never acknowleged each other but a witness says John definitely saw her. AWKWARD!