For some reason they don't seem to like the West Coast very much, but who knows Los Angeles may have a presence.
Once Vegas opened up, anyone who was anyone in the California underworld moved there. Since then, the gangs have had too much power and numbers for any mobsters to muscle them out of the drug game, leaving only gambling and vice rackets which were never really big in California. California is mostly suburban communities where everything shuts down at 10pm on weeknights. Outside of Hollywood and San Francisco, only the tourist destinations, beach areas and central downtown districts have any kind of nightlife, unlike the northeast where there's bars and cardrooms everywhere.