My wife and I chatted about the size of the casino on the cruise ship, it's also of course centrally located, takes up about a third of the ship on one level (out of 16 levels). It's closed while in port of course, but when cruising the one arms are almost packed. You can use your cruise key card to play. (I think you need cash to play BJ).
I guess you can win big playing, and it happens, I know they tailored the payoffs precisely to garner interest. I don't really understand playing a machine who spits out randomness with zero control. Humans like gambling even after losing consistently over time I surmise. I think they recall their wins and bury their losses.