You have to use your player card. A player card is given by a casino and is used to track your play. You need to move on a string of slot machines. It usually records the information about how you can bet. This information is given to the main customer service computers that give you the comp points or cash.
The basic idea is very easy and works very well. In case you play for 7 hours on slot machines and can lose five thousand dollars. You can use a player’s card. The casino never sees the play and would not provide you the comps that you want.
When you arrive at the blackjack table, you have to provide your card to the dealer. He will give it to the supervisor who will have to enter the player id into his computer. He will record the buy in amount and how much you bet on one hand.