The only cruise I have been on visited a different port every day for 7 days. I have always wondered what all the passengers do when they have a day "at sea". Where do 6000 people go? There are surely not enough lounge beds around the pool(s). Are there enough activities to occupy everyone? A friend told me that she spent the "at sea" days in the casino. (I can do that closer to home.) So what happens to everyone when they can't go ashore?