It's safe to say that on the West Coast, there are no more functioning Mafia families. Tommy Gambino is technically the Underboss/Boss, but there's nothing left to manage.

What does happen out in LA is that various soldiers from a variety of families work together. A lot of them own legitimate businesses, restaurants mostly, and who knows if any actual illegal activity occurs, although if it does, it's likely higher level financial crimes.

This was true back in the 1980s/1990s. If you look up the various Mafia busts from 85, 96 etc, there were guys from Chicago, Patriarcha, Gambino, Colombo all in on them.