Every Thursday, Bottom's Up Bar hosts free karaoke night. No cover, no ticket, just show up. The night runs weekly, so if you miss this one, the next one is seven days out. Bottom's Up is in the Tenderloin; nearest BART is Civic Center (about a 10-minute walk). 21+ to drink, check their door policy if you're bringing someone younger.

Free karaoke in SF that isn't a one-off tends to build a regular crowd, which means the song queue moves at a real pace and the room knows how to react. This isn't a Wednesday happy hour afterthought — Thursday gives it enough midweek energy that people are actually there to sing, not just watch.

Practical note: street parking in the Tenderloin on a Thursday night is genuinely rough. Take BART or Muni. If you're coming from the Mission, the 14 drops you close. Rideshare pickup on Turk can be slow; walk a block toward Larkin for a cleaner pickup spot.

If you've got two hours: get there early enough to put your name in the queue, order something while you wait, and you'll be on the mic before the night peaks.