Just tesing the waters here...
I am considering putting together a Dainese sponsored group ride in the Bay Area. Essentially we would meet up at the Dainese D-Store in San Francisco for an early morning breakfast, load up a tour bus full of people and bikes, and head out to Downieville (or some other destination. I'm open to ideas.) for a day of riding.
I thought it would give city dwellers without transportation the chance to ride some terrain they have probably never seen, as well as give others the opportunity to enjoy some bashing without worrying about annoying traffic on the way home (especially nice if nursing sore muscles and fresh rash).
If enough people show an interest, I have the option of working with a couple of local shops that could supply gear and bike demos as well.