Looks like I fly via Los Angeles, so I can make a break there for a meeting and than do one in San Jos. If needed, I could even come to San Francisco to meet a few people. In all three places, I have >50 plugin users in a 100 km radius. So a lot of people could join us.
As far as I see people voting for San Francisco meeting are not actually from there.
So doing it in Oakland or Richmond could be better for people to drive to.