Penalties are assessed by the cruise lines if your cruise is cancelled too close to sailing. The cancellation policy does vary by cruise line, so it is important that you understand exactly what this is. Like other Terms and Conditions related to your cruise, the cancellation policy is listed in the back of the cruise line brochure. Make sure you have a current version of the brochure, as the policy may change. At night, life aboard a cruise ship really turns on.
Most ships even have casinos.
And the night can go on as long as you want. Even until the spectacle of sunrise at sea. On a cruise vacation, the entertainment is on the house. There's no cover. No charge for an admission ticket.