Es Chata’ai Ani Mazkir Hayom…
I once went on a “non-kosher” cruise with some friends (I’m not advocating for it, just saying I did it). We saw a few other Jews so we tried putting together a minyan, but it didn’t really happen. Then all of a sudden on Friday night there was a minyan with like 50 people. I don’t know where they all came from.
The airline food was decent, I never would have paid 5 times the price (literally – look it up) for whatever a kosher cruise offers. Most of the issues which exist on a non-kosher cruise are either avoidable on your own, or not solved by a kosher cruise.