Well, the Hyde St. Pier shanty sing will be on the first Saturday, so that will be on Sat., June 7. There's also the monthly Harmony sing in Berkeley, which is on the first Wednesday of the month, so that would be on June 4. The Starry Plough (Berkeley again) Irish session is every Sunday night, but it really runs more toward instrumentals than a sing-around (although if you let Shay or Peter know you want to sing, you'll usually get at least one chance to share a song). Its been too long since I've been to the Plough and Stars (SF), so I wouldn't want to steer you wrong on that one.

Other than that, I don't know; anybody else got any?