Frank and Jacqueline Bonanno's subterranean speakeasy in Larimer Square is a show-stopper. "Fronted" by a diminutive pie shop that gives no indication of what exists beyond the swinging doors, the low-ceilinged, moodily lit space reeks of sensuality, romance and swank elegance, and the clever, highbrow liquid assets, all masterfully concocted by some of the city's most renowned bartenders, who don't miss a drink, complement the polished crowds that sip the night away. Yes, there are rules — no cell phones, no rowdiness, no standing, and a plea for conversation that doesn't inflate the decibel level — but the thrilling cocktails more than compensate for them.