Partying with my Roommate

In his final year at university, Tanner is forced to find a new living arrangement off-campus. He finds Justin who needs a roommate, but the room comes with a catch - Justin loves to party and has get-togethers every weekend. This worries Tanner, who's much more of a lone wolf than a social butterfly, but it's hard to pass up the great deal and the kind roommate. The constant partying is a definite strain on Tanner, who spends his time locked up in his room waiting for the night to be over.
But when Justin insists that Tanner comes out of his shell and joins the dancing and drinking, both of them are in for a night that they never expected. When they end up locked up in Tanner's room, what kind of fun can they have all alone with the party thumping just outside the door?