19. Trocadero Theatre in Philadelphia
Long before Death Cab for Cutie and Toots and the Maytals were playing the main stage, the Troc's biggest stars were burlesque heroines such as Blaze Starr and Gypsy Rose Lee. The rock club in Philly's Chinatown district opened in 1880 as a vaudeville-and-minstrel-show outpost known as the Arch Street Opera House; its live-music incarnation began a century later. The club has persevered through financial trouble in recent years – its operators filed for bankruptcy in 2011, and blamed Ticketmaster, citing "burdensome" convenience charges.
Fun Fact: Although many of the old buildings on this list are historic landmarks, the Troc is the only 19th-century, Victorian-style theatre still running.