Couchsurfing has a link for that:
Location: Places >> North America >> United States >> California >> San Francisco Bay Area >> South Bay Area Sunnyvale, Mountain View, Santa Clara, San Jose, etc.
Search for lodging for graduation in May
Hello to everyone!
I'm hoping to find lodging in order to attend my graduation ceremony at San Jose State University.
There will be two ceremonies, one on May 18th and one on May 25th.
I could pay for lodging and help around the house/apartment to return my kindness. I could also host you in return in Marietta, Georgia near Atlanta.
Metro Atlanta is pretty gentle and nice. It has some interesting museums, history, nice nightlife and cultural venues. Life is less expensive there as well than the Bay Area.
Please contact me if my offer interests you.