I saw people using their room card to pay for things. Not sure if they were using snack credits or charging to their room but many people used them. I liked the wrist card. It was very convenient and kept the very, very long lines moving. Easier to stick it back on your wrist than wrestle with your wallet or secure your cash or card in a pocket while juggling food and drink. You can get the card at any of the food locations. When you purchase your first sample get your card at the same time.