Upper 50's been on 16
DCL cruises, many with just the 2 of us.
It's kind of become our vacation of choice. Just visited
disneyland a few weeks ago - WOW way to crowded!!
Enough to keep you busy? Depends upon what you like to do.
On sea days we will walk 2-3 miles on deck 4 around the outside of the ship, will spend a few hours up in the pool decks, reading, relaxing and enjoying doing nothing for a while. On shore days we are on an excursion of some sort (if Caribbean, then snorkeling, Alaska, going to glaciers, hiking, whale watching, etc, if Europe, site seeing...)
We're not "drinkers" and have never participated in a mixology class, nor have we participated in BINGO.
We do go to many trivia challenges (hit the Disney ones, skip the 80's and 90's music ones since we wouldn't have clue as to what/who they are talking about)
There are usually "talks", "cooking demos", Towel / Napkin folding, drawing "classes"
Movies in the theaters (only made it to movies 2 or 3 times during the daytime on our 110+ nights onboard - there's other things to do)
Live entertainment in several bars / venues (Clara Oman, primarily on the Magic has become a favorite!!)
and that doesn't include the nightly main shows in the Walt Disney Theater, in the "Adult" entertainment district.
If you are Spa people there's a spa on each ship.
For us the hardest thing about a
Disney Cruise is deciding what NOT to do!!