Stavros Niarchos Thinks Brandon Davis Is A LOSER!

According to PageSix, BRANDON "Greasy Bear" Davis is so unpopular, even his friends don't want to be associated with him.

The oil-heir grandson of the late Marvin Davis showed up to the Details magazine party March 29th at producer Mary Parent's house in Hollywood and became enraged when he was denied access.

According to our spy, "he started demanding that staffers get Stavros [Niarchos]." The Greek shipping heir had evidently told Davis about the party and was already inside. But when staffers found Niarchos, he begged them to tell Davis that he wasn't there, adding, "I didn't invite him here, and I don't really want to be around him."

Niarchos then joined the other revelers. Davis eventually made such a fuss that he was allowed in - and Niarchos beelined to a Details editor to apologize, adding, "You know I would never bring him here."