As if we needed an excuse to knock off work early, Bullion’s elegant version of a happy hour, weekdays from 4 to 6:30 p.m., is just about irresistible. Called L’Apero (the aperitif) and served in the restaurant’s luxe bar and lounge, it offers a menu of small bites for $9 or less, along with cocktails and good wines by the glass for $8