Re: Asian women
On a couple of occassions where I have gone to the Chumash casino there were a couple of, perhaps Vietnamesse, women who did not sit at the table but would watch the game and then place bets on different players hands. I do not think they were counting, just hoping to come in with a lucky player. In relation to your post, since they are known for doing this, if they learned to count, it appears to me that they could wong into shoes for a prolonged period of time before anyone might even think about their play.
If this is common in other locals, then perhaps you should start recruiting.