The decaying, ancient-looking building lends just the right air of consecration to this, an essential spot for traditional jazz fans and, well, everyone (Robert Plant and U2’s Edge have sat in here). With little air, so-so sightlines, no bathrooms (you are warned), and constant crowds, the awesomeness is in the hallowed, intimate atmosphere and the superb musicianship. Shows start at 5, 6, 8, 9, and 10pm; the line starts forming about an hour before. Go early for bench seats (the line can be long—bring a go cup), or prepare to stand or sit on the floor. A few line-skipping, up-front “Big Shot” seats are sold online; get them well in advance.