They will not have a forced manner to the gamblers, but they will use a smooth way without any hard feeling anything. The casino knows how to treat the rich gamblers, so they don't decide to stop quickly, but they will only spend more money to play other gambling games. Maybe they will also offer a girl to that rich person to join with them or sit beside them because the casino will do anything to make that person comfortable with their services.
This is how any adequate business behaves. It is important for business to sell you its services. It does not matter whether it is a casino or a restaurant or a clothing store.
All of them are united by one goal - to sell you services. The more you are within their environment, the higher the chance that you will spend more money.
You, in turn, allow yourself to be there only on condition that you will be comfortable. This is what any business should do - create comfort for its customers.
Casinos in these things have gone much further than some areas of ordinary business and they have something to learn.