Calvin Klein's on/off boyfriend Nick Gruber was caught up in a nightclub brawl at the weekend (20-21Jul13). Gruber was partying with pals at a bar in the Hamptons, New York on Saturday night (20Jul13) when he clashed with a fellow reveller. He lashed out and punched the unidentified man in the face for shoving him. Cops were called to the venue, SL East, but model Gruber had already left. He has not been quizzed by officers over the incident. A spokesman for Gruber tells New York Post gossip column Page Six, "The guy pushed him first, then there was a bit more pushing. Nick punched him out of self defence, and the guy suffered a cut above his eye. Nick is fine... Nick does not know the guy, nor does he know why the guy started pushing him. Unfortunately, when you are a well known face, people target you for the wrong reasons."