We just got back from the Sovereign of the Seas last night. On the cruise ship, you will be charged for alcoholic beverages, sodas, on board activities like Bingo, casino cash advances, etc. The ships are "cashless", which means that your ship board purchases are applied to a "charge account". At the end of your cruise, these charges are either applied to your credit card, or settled in cash. Hope this helps ! Have a great time ! You will be hooked !