After seven seasons of “Entourage,” Kevin Connolly should be well known to Manhattan’s gatekeepers. But the actor got held up at the door of Meatpacking District hot spot Bagatelle the other night because the doorman didn’t recognize him. Connolly came with a group that included AOL chief executive Tim Armstrong and European sales executive Kate Burns. “Kevin was very nice about it, and the general manager apologized,” said a source. “They joked about how the doorman doesn’t watch television.”