I am wondering about the Casino on board. Do they take actual cash or is this on your card?
Actual bills (no change) can be inserted into machines. When you are finished with a machine no tickets are printed. Your cash balance is transfered to an account linked to your card. You can add to or draw from this account during your time on board. On the last night of the cruise (or sooner) take your card to the cashiers cage for final cash out.