The choir associated with the Bay Area Solstice (the Bayesian Choir) meets year-round (though we stepped up the schedule and acquire some extra singers close to Solstice), at my house. If you would like to be in it, you probably can, let us know and we'll get you on the mailing list and in the Google drive. When we're not prepping for Solstice we do other songs (including some goddier choral stuff) for fun.