Slot machines don't require cards - you can feed your money straight into the machine and when you are done you will get a printed receipt with your earnings and you can encash that at the cash counter along with your chips. Soft drinks, tea and coffee are on the house. There are people around you playing for hours and losing quite a bit of money. Tripled my money there and decided to call it a night. Then moved to the tables and after a bit of looking around was able to get a seat at a roulette table. I started out with the slot machines and had no luck whatsoever. On one side there are the slot machines, followed by the online multiple player gaming stations and then you have the tables for Roulette, Blackjack, Poker and the likes. Quite a few people seemed to be regular gamblers. It was crowded with locals as well tourists. They check your passport at the time of entry and after that no card or anything is required. If you are allergic to dense smoke then avoid the rest of the casino as just about everyone is smoking while gambling. Its spread over 3 floors - one section of which is non-smoking.
MBS has no dearth of places where you can blow up your money and the Casino is number one on the list.