It all depends on the "cruise director".
We were on N Statendam and there were opportunities with BB King, and the pianos, and a DJ.. Forget about the Rolling Stones lounge. Things are changing. Young people seem to like dancing "at a distance". Bands are being cancelled. We even had music in the Crow's Nest and recorded music. On Zaandam and Zuiderdam we were disappointed.
Fast dancing: the second best form of exercise; slow dancing leads to the first.