Here's a link to an upcoming bike maintenance class at the San Francisco REI store:

http://www.rei.com/stores/store_even...ignore_cache=1

A couple of L.A. REI stores are giving free basic bike maintenance classes on June 13th. You might want to check other REI stores near you to if see they're offering something similar (go to REI.com, click on "Stores and Events", put in your local zip or city and check each store's page for it's own upcoming classes).