Quite a few years ago, I took the Scotia Prince ferry overnight from Portland ME to Yarmouth, NS.
Apparently it was being promoted locally in Maine as a "mini-cruise" where one could make a long weekend trip to Yarmouth with added attraction of gambling once the ship was in international waters.
To add to this motif, as I boarded with my bike, there was someone selling drinks with little umbrellas in them.
I hear a woman ahead of me discretely ask about dress for the dinner meal. Not sure what the answer was, but my thought was hopefully I didn't end up at her table with my bike trip clothes...
I took that same ferry many years ago, as well. I noticed the little umbrellas in the tropical drinks, too. I was astonished that there actually were some folks who took the ferry as a pleasure trip and didn't even overnight in Yarmouth.