As long as The Foreign Exchange is performing, no one can ever even think about showmanship being dead. The eight-piece band that took the stage of B.B. King’s Blues Club & Grille on Friday night moved the crowd in a way that few acts are capable. And it all started at 1 a.m. As such, you would think a show starting that late would lend itself to a somewhat less-than-energetic audience. But that was simply not the case—this is New York City we’re talking about.