S4·E13 Three's a Crowd

Marvin, the owner of Falls Taproom in Philadelphia, contacts Charles Stiles after hearing rumors of a feud breaking out between his girlfriend/manager and his best friend. The Mystery Diners point to bigger problems with the owner's friend and regular customer behind the rumors. Showing up intoxicated, he had been harassing customers and the manager. When confronted, Marvin ends his friendship with his friend and bans him from his bar. In his exit interview, the former friend expressed his remorse in his behavior and plans to make up for his misdeeds. Marvin later apologizes to his girlfriend, who will only forgive him if they go out shopping the next day