When we checked in, they gave us the red room keys and told us to use those for player's cards. Knowing my past behavior of leaving my slot card behind, I didn't use the key for most of the time I was there. But, before we left, I stopped by the "Red Club" and told them I was reluctant to put my room key into a machine lest I forget it and walk off. They made me a slot card to use instead. It looks just like the room key, except the room key has "RESORT" printed on it. I don't remember if the slot card has anything printed or not. I'll try to remember to check when I get home.