What is it about jazz clubs and basement bars that fits so well together? This stylish spot, situated in a subterranean space on a side street in the Flatiron district of Manhattan, hosts classic jazz acts as well as blues, R&B and funk outfits. Some recent boldfaced names filling seats in the speakeasy-style space include Bill Frisell and Jimmy Cobb, and Mingus Big Band, a 10-piece act, has a residency on-site. Cover charges vary based on nightly act, and can fall anywhere between $20 and $40. Fortunately, though, there is no drink minimum, so budget-conscious music fans can just sit back and enjoy the show.