The sound can be murky, the toilets are often dubious, and the neighboring establishments range from simply divey to dangerous. But, hey -- no one ever said rock and roll was pretty. The 15th Street Tavern is still the best place to get rocked, both for the quality of its musical fare and for the, er, uniqueness of its environs. The Tavern's concert calendar is consistently jammed with the most buzzed-about indie rock, pop and punk bands going, and the atmosphere -- equal parts Barfly and CBGB in the '80s -- is its own sensory experience. Just don't be offended by the brusque doorman, and remember to bring along your earplugs -- and maybe a small bottle of Febreze.