One more day in San Francisco to take meetings and explore. Suggestions?

I'm wrapping up a trip to San Francisco where I've been exploring the city for a possible move from NYC and chatting with a few people about our startup (PortableApps.com, ~2m absolute uniques/mo, ~3-5m users worldwide). I've checked out SOMA, Mission, Castro, Oakland and surrounding areas, taken BART/MUNI a bunch of places and met with our designer and some local developers. For the last day, I was thinking about checking out a local startup shard work space or incubator or two as well as trying to take another meeting or two. Any suggestions would be much appreciated. Thanks!