Not in my eyes, if I am on a cruise, I don't want seen anyone with masks or people going crazy in isolation. This is a cruise for heaven's sake, most people get their annual flu shot and that should be sufficient.
With the flu no one was being isolated, most people know to stay low for a coupe of days because you're not feeling great, that what I call back to normalcy.
Kantjil de Tijger is a great restaurant, order the Rijsttafel!! Other than that a couple of days staying in Den Haag would have been better, but you won't have time:
They are basically a lot of fun, of course they want you the buy the wine packages, but the wines they pour and the cheeses etc. appetizers make it well worth it.