There are two ways to tip craps dealers:
A Hand-In.
Throw the chips on the Craps table. But don’t forget to say “For The dealers”.
Bet for the dealers.
You can toke the dealers by placing a wager for them. If the bet you have made for the dealer wins the dealer gets not only tips (the bet) but also the winning amount.
When to tip
It is up to the player to decide when to tip. The player can do it during the game as well as after it. It is only natural that dealers like it more when you tip them during the game when you are lucky and win because then it can happen that you lose everything and has nothing to tip the dealer with. The smartest approach for a player is to bet for the dealers during once or twice early in the session, and do the rest of your tipping as a hand-in when your session's over. The dealers will notice your early bets for them and make sure you get good service, and by delaying future tipping to the end of the session, you can avoid a situation where you tipped heavily during a hot streak and then hit a bad streak, with the dealers winding up with more money than you.
Which bets to make for the dealers
Dealers appreciate any wager made on their behalf, but they greatly prefer bets that have a low house take, such as the Pass, Come, Don't Pass, and Don't Come.
Dealers hate the wrong bets because they don’t let them double or triple the tip.

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