If someone wants to go early and save some spots for people - RSVP and put that in a comment and you will be the organizer for this meetup. Otherwise this is just an FYI.
Great free concert in SF - come early to reserve spot on grass, bring a little wine, cheese, get ready for fabulous mix of latin/jazz/pop. http://www.sterngrove.org/home/2013-season/august-11/pink-martini
Concert starts at 2pm. You would need to get there around 11 or so to get a spot in the concert meadow for a group.