Are there any catholics in the Vatican? At the moment there are more than 160 Alfas listed to be exhibited at the Concorso Italiano in Monterey on August 19th the day before the historics. That doesn't count another dozen or two in the "corral".
As far as Alfa clubs, check into the Alfa Romeo Association which has lots of members and lots of great events throughout the year in northern California:
http://alfaromeoassociation.org/
Come on down! The website has a calendar and listings of meeting and events.
You should find quite a few Alfisti in and around Salinas.
Happy driving!