I think those scheduled activities were for the in-story cruise itinerary. More like an ostensible reason to get ”passengers” to the right places on the ship so they can observe different scenes of the story unfolding.
So the 3:30PM ”dance lessons” are “real” in that they really happen, but Disney doesn’t put a whole lot of effort into them because they don’t want to compete with the actors acting out story beats all around the atrium during the ”lesson.”
EDIT TO ADD: Check out this video of the TERRIBLE ”dance lessons,” but listen to the audio at around the 1 minute mark. Sounds like a Stormtrooper saying something story-related to me:
I think you are reaching because that is what I wish happened too. It is probably the intent somewhere in the Entertainment department but does not come across that way.
That Dance lesson could have been a two-minute thing as other important things start to interrupt and change the goal with acticity people becoming more concerned by the presence of Storm Troopers. I think this is just a thing to fill the area while other members of the family go sit at the bar.