Originally Posted by Seven
I would recommend visiting The Bruery
in Placentia. It's probably under an hour drive from L.A. and a must visit if you like sour beers.
I just visited the Bruery a couple weekends ago for the first time, and it was great. The tour there is very homebrewer friendly too. More of a "walk around the brewery and ask questions" kind of tour than a step-by-step explanation of the brewing process (like Anheiser Busch). They also pour you samples throughout the tour.
Flights in the tasting room are inexpensive, and it's a nice setup for hanging out (board games, TVs, etc.). I'd get there before 2 if you're going on a Saturday though, as it gets pretty crowded in the tasting room and the signup for a tour may be full for a couple hours.