Time Out says
Each January, Winter Jazzfest offers a crash course for anyone interest in exploring NYC's jazz scene. Its signature two-night Greenwich Village marathon brings vets and up-and-comers, hordes of music fans and a palpable air of excitement to an array of cozy downtown venues. The shows aren't individually ticketed, so a wristband grants you access to any of each night's shows—as long as a given club doesn’t hit capacity, that is.
RECOMMENDED: A full guide to Winter Jazzfest