It's true, they do have a lot of "on call" time but it isn't true that they don't get to go ashore. I talked with a cruise ship nurse who accompanied a "guest" to our ED once and she told me they did get a chance to visit in ports of call, but that ...
Not very likely; those ships have huge stabalizers, they hardly roll at all. It they did those big, elaborate stage shows, with acrobatics etc., would be impossible.
Stargazer, are you still out there? I have been considering this option and would like to know what your experience is. It is true that the pay is very low?