Last October on the Zuiderdam, there is coffee and iced tea 24 hours in the Lido. It is open at 6:30 for "continental breakfast" (danish, cold cereal, yougurt, juice, fruit) - 7:30 for breakfast buffet. Closed at 10:30 to switch for lunch. Lunch buffet 11:30 - maybe 3:00? Not quite sure - the Terrace Grill was open longer. Dinner buffet was from 5:30 (maybe) - 10:00 or 10:30. Closed until 11:30 for Midnight Buffet at 11:30. The ice cream stand was open until 11:00 every night.