A friend of mine work in a cruise-casino.
She explains that the first "trick" if casino is losing money consist to continue to play, delaying closure time (more time you play more probably you will lose).In some games like roulette it could possible also the change of croupier.
of course there are some "distractions" like free drinks offered to various gamblers.
Interesting, this is to delay or stop the momentum if you are served drinks several times, the gamblers tend to lose because of fatigue factors, they cannot keep up on keeping their winnings for long hours, the casinos are good in keeping you play they will treat you like a king and give you everything you want and need.
And this is why we do see all of those things around on a casino.Good view and Good ambiance which would really make a player stay and would really lose their money in the long run.
They dont even have a clock inside the establishment so that players wont really be aware on whats the time and they would thought that it was still early to go home or stop.
Distractions like these are common and even though these are the basic ones but hey it actually works and make this industry become profitable in the end of the day.