I just heard about this. Sounds interesting to me, so maybe to you, too:
Afternoon of June 8th, Richard's Grove and Sara Lee's Vineyard adjacent to Santa Rosa. 30 local wineries pouring, barbecue dinner, Zydeco Band, etc. For details, contact organizer Wayne Lindahl at: firstname.lastname@example.org
It's a benefit for "Friends of the Healdsburg Wine Library". Not sure whether attendance gives you circulation privileges.