Tucked away in a subterranean space below Larimer Square, Frank Bonanno’s new cocktail lounge is literally underground. But unlike the Prohibition-era speakeasies it’s modeled after, Green Russell is otherwise aboveboard. Indeed, given the buzz it generated prior to its opening, you’d be hard-pressed to find a drinker in Denver who doesn’t know about this dark, cozy den, where local masters of mixology tailor their libations to your tastes Thursday through Sunday nights. The friendly crew also gladly serves up a limited but cheeky selection of eats that includes slices from Wednesday’s Pie, the tiny shop that Bonanno has installed as a faux-front for the bar.