When you’re at a casino, you’ll be using your club card to get free things. This is a plastic card that has your name and other information on it.
When you go to a machine and put money in, the machine will ask for your club card. If you don’t have a club card, the machine will give you a warning and refuse to give you the free game. .
Your club card is also used to get comps (compensation). This means that the casino will give you something extra in return for spending money there.
For example, if you spend $100 at the casino, the casino might give you $50 in free chips.