You're right -- we need to decide!
It looks like it will be nice, so how about meeting up Sunday afternoon
at the Yerba Buena gardens, perhaps at the Samovar Tea Lounge (if
there's room for a group) and at the general tables there (if there's not).
Here's a map:
http://www.yerbabuenagardens.com/maps.html
Samovar is on the upper terrace, above the waterfall.
3pm is a good meeting time -- what do other people think? I can bring a
Wikipedia sign so it's easier to find each other. Also, let me know
off-list if you want to come or if you think this is a bad time/place.