I haven't done the cruise, but judging from the itinerary, I get the sense this is much more of a "floating hotel". Each night you're given time to "explore" the city where you have landed. A small ship like this does not have the space to have all the entertainment you would find on an ocean cruise ship.
We took the Danube River cruise this past September. There was some entertainment, but nothing like on the big cruise ships. RSVP brought their own cabaret piano player and singer. Danny was onboard to provide hosting and play a few games. The crew show was a highlight and great fun. There was a dance on a couple nights. One was quite late.