Jeremy Piven–the comedic actor who plays the uber-agent on HBO’s “Entourage”–was told never to show his face at Matsuhisa in Aspen or any Nobu restaurant again. “The ‘Entourage’ arriviste has reportedly been warned to keep away from Nobu Matsuhisa ‘s restaurant empire after boorish behavior in Aspen during the recent U.S. Comedy Arts Festival,” snips columnist Ben Widdicombe. “‘He was asked never to return to Matsuhisa in Aspen by a manager,’ alleges a snitch. ‘He came in with a large group of 12 or more without reservations and asked for a table. It was a very busy night, but a table, although cramped, was provided. On his way out, he made a nasty comment to the manager: ‘Thanks for nothing.’”