First of all, the first thing you want to do when you land in the U.K. is go register with a casino. British law says that there is a waiting period of 48 hours before you can gamble. This is their contribution to gamblers who have a problem.
They treat you like royalty at the Palms. That is probably because they get a lot of Saudis in there. The dress is dinner casual. Do not go there in your jeans! Gentlemen must wear a jacket and ladies must be appropriately dressed. This not Vegas.
When you walk in, you feel like you are in a James Bond movie. Drinks are free. The casinos are not as large as Vegas, but they are certainly more elegant. If you are looking for an experience that will make you feel like a million bucks, this is it.