I like cruises but you are right there is much about them that is a booze-a-rama.
I think one of the sober cruises would be so much nicer.
The last one I went on was with a group of 15 and included the partiers in my family.
So, I loved going to the spa. Then I spent alot of time dodging them at night actually walking a circuitous route and almost got "caught" at that just trying to get to my room while they were clubbing and whooping it up.
They then came pounding on my door at 3am and I had no respite.
I booked an excursion to one of those "islands" because I wanted to do things and I was especially looking forward to snorkeling.
The boat that took us to the island had drinking games as the sole entertainment both to and fro.
I would love to go on another cruise but I would choose my companionship very carefully.
or better yet..take a sober cruise.
Those drinks are hugely expensive too!