I am shocked to find out that any poker casino in Southern California would have $50 chips since the Asian population of players is so large. What were they thinking? I have never seen a $50 chip, though I have seen fifty-cent chips in use.
On the rare occasion that a player buys into a craps game at Caesars Palace in Vegas with $50 bills I always ask them (if they are near me) are you from the East Coast? Of course they always answer yes. And that leads into a discussion of fifty dollar bills.
$50s are commonly used in the East.