You're probably too late to get space in one, but a Chez JJ or similar airbnb where you sleep 6 to a room of like-minded individuals can be interesting (and a pretty cheap deal versus a hotel).
Visit Hacker Dojo, Google's campus, and Computer History Museum, all in Mountain View.
Visit Hacker Dojo, Google's campus, and Computer History Museum, all in Mountain View.
Try meetup.com to fill in time gaps.