THERE'S A $5 DONATION FOR THIS ONE
Greetings! I found an outstanding space for singing and jamming: Hillside Community Church, in El Cerrito. As mentioned above, we have to pay to use the space, but trust me, it's worth it!
It's up on the hillside (duh!), and it's got stunning views of the Bay, SF, the Golden Gate, Angel Island, and so on. Plenty of padded folding chairs to sit on, and they have a big kitchen table for whatever snacks and refreshments we bring (beer and wine are OK).
Hope you can come, and if you sign up, please remember to cancel if it turns out you can't make it so someone else can take your place.
Here's a link to their website, with a map, pictures, and so on: