This informal gathering attracts plenty of Interesting People -- many of the local Celtic (and other) folk musicians and their friends. It's a potluck; bring something tasty and interesting. Follow the link above for more information. (It's held at an undisclosed location in Palo Alto; contact the band -- or me -- to find out where.)
It's usually the first Saturday in May... for some reason it's early this time. Guess they'll have a Marchpole.