There’s a bar on every corner in this city that never sleeps, but intrepid cocktail connoisseurs should belly up to The Campbell, tucked away in Grand Central Station, just a few blocks from The Renwick Hotel. The former office of a railway tycoon and a Vanderbilt, the bar’s prohibition-era swank is matched only by the eye-popping prices of its classic quaffs. Slightly less prohibitive is Flatiron’s Raines Law Room, a local favorite speakeasy-style drinking den that feels like a plush Victorian parlor, with old-fashioned call buttons to catch the waiter’s attention at each seat. If the weather’s fine, grab a table nearby at Gallow Green, an ivy-trimmed Chelsea rooftop bar that also features live music. Prefer beverages of the malty, hoppy variety? Zum Schneider is a rowdy East Village beer hall where Oktoberfest is alive in spirit year-round.