Theoretically, tips are accepted in all gambling establishments. In practice, not always the croupiers get them.
Toke, Tip – the reward that the player allocates to the croupier.
At the table usually give a "tip" chips, although the rules of the casino can accept gifts of money, drinks, sweets and so on.
Tips can be individual when each dealer he takes them for himself, or when the whole amount is divided into shifts.
If you want to thank the dealer, specify the rules, acting in the casino. It is possible that all tips go to the cashier of the institution.
Remember that attempts to thank the dealer with any in unofficial ways, it can be considered as a Scam.