There are three of us adults sharing a room. We'd like to just carry our room cards and charge everything (easier to see where all the money goes) I just called and was told that we'd have to save receipts to figure out the charges indivually, they can't code the cards. I thought I remembered someone saying that the printout actually indicated via card 1 or 2 or 3, which charges were which (as long as you didn't mix up your cards mid stay) anyone have any input on this?