Trying to gain an edge over a casino dealer depends on the dealer’s experience. New dealers can give away lots of advantages if you know how to look. Some new blackjack dealers will expose their cards, and if you’re sitting in the first or last seat you might catch a glimpse.
You could always try and flirt with the dealer if you think they might like you. You won’t get anyone to give you a break, but you might be able to frazzle them enough to make a mistake. Then the mistake has to get past the pit boss and the security staff watching the tapes of the game. So getting freebies from the dealers is a tough one to pull off. You hear stories of dealers and patrons trying to steal from the casino, only to get caught and charged. It’s not the best way to beat the house.