Casinos do not expect you to do that but they cannot stop you from trying. What it really boils down to is that they are in the business of making money and they have to make money. If you think about it, they will always try to get more money from you so why would they stop you from trying to win? They are in the business of making a profit. If you are going to gamble then at least act like you are playing for free.
If you go into a casino and lose more than you expected: they are not going to give you your money back. Ever. Even if it was a million dollars. That is their job. Do not let other people tell you what to do or how to act when you are at a casino. Do not let them catch you betting or playing with fake money. Casinos know the game just like you do and you should never be allowed to act like an idiot while you are playing. Casinos are professionals at what they do and they want you to be as well. It is their job to win and they have to keep their money too.
The last thing that you should ever do before you enter: a casino is drink any beverages before you get into the house. Most casinos will require that you do this. If they do not, then you should not. Drinking any beverages will keep you from concentrating on the game and will also slow down your reflexes. This will also affect your ability to count cards and follow the game rules. A little bit of alcohol before you play can be very helpful.
Another thing that many casinos: don’t expect you to do is to eat before you go into the game. Many people assume that they will be able to eat anything that they want before the game starts. Some of them even take any food that they have with them before they leave. While this may be fine for your body, it is not going to help you at all when it comes to betting or playing. You need to eat when you have a chance otherwise you will run into problems of withdrawal later on.
Many casinos also do not expect you to do: that you should not touch your money before you bet your money. It is very easy to lose money when you are in a game with large sums of money at stake. That is why most casinos will require you to bet using a credit card.
If you do not have one of these readily available, you may wish to call the casino ahead of time and find out if there are any ATM machines available for you to use.