A cruise ship seems to be a self-contained world once it is at sea. It occurred to me that if one could ensure that anyone on board s free from the virus, or immune, then occupants could associate freely without risk. This would reduce some of the burden from society, and provide some income for the operators. They wouldn't even need to leave port to be effective. Of course they would need to have medical facilities on board, and any supplies or visitors would need to be checked thoroughly.
Why would you want to be on a cruise with the people you don't know while you can get your own boat and live on that with your family?
There is even a better choice: Bunkers. Rich people already have them.
Or ya know, you don't even need a bunker. Just stay in your house and have food delivered, or go to the grocery store with a mask on.
Your house is the best you're going to get in a time like this, honestly. Just take the proper precatuions and you're most likely going to be okay. Even if you're young and get the Coronavirus you're going to be fine, just don't interact with those at risk.