I had thought Shadow of a Doubt was filmed in Santa Rosa. At least, IMDB claims that it was. Great movie!
 
A tour is always a good thing. I'd love to go back, it's been a while (2008) since I've been there.

D'oooooh!  Got mixed up.  SOAD was, indeed, filmed in Santa Rosa.  Petaluma was one of the prinicple locations for American Graffiti.
 
Bill, tgo

And if you head south on HW 101 through Petaluma and Novato to San Raphael you'll find Terrapin Crossroads. When my son a I toured Alembic as part of his college graduation present last year we lucked out and one night were able to listen to Phil playing in a group with his son Grahame  and Warren Haynes.

Terrapin Crossroads was the last stop for us prior to departure. We spent several hours there eating, drinking and listening to live music featuring Grahame.
 
The atmosphere is comfortable and relaxed, the service is attentive but not pushy and the food is quite good (traditional favorites and some surprises).
 
Highly recommended - even if you're not a Deadhead!