I was born and raised in San Diego, Ca. There are two masjids for shia in San Diego, IECSD (Farsi) and Imam Ali (Arabic/Iraqi). In the last year another one, the Noor Collective has popped up which runs independent of either. They operate at both, but usually run their programs downstairs at the Imam Ali center. Check them out here: San Diego Shia Islamic Center
They run their programs exclusively 100% english, which is a first. That's where most of the 15-35 year olds which used to frequent both center usually now frequent.