Gambling cruise usually for day trips. Only the regulars stay overnight and you need pay extra for the rooms (usually by exchange of rolling chips). The hardcore ones dun sleep so dun need cabins they will sleep at lounge or the staircases even that’s why they later discourage overnighters without room.
There’s nothing to do but gamble on the gambling cruise coz they are much smaller. There’s a sad lounge cabaret getai type performances which almost no one watches. There’s massage joint with a few masseurs used to be Indonesians. And a swimming pool which no one swims . Other than gambling you can eat buffet during mealtimes