For breakfast and lunch can be eaten in the restaurants (open specific times) or at the buffet, they have a menu posted outside, they change each day. Soda is available in the sit-down restaurants for any meal at no additional charge. Room service is available 24 hours a day at no additional charge, except for drinks and gratuity.
One thing the servers like is that you are not late to dinner, especialy if you are on first rotation. They have things they need to do in order to get ready for the next seating.
Have a great trip.