I have found the restaurant to be hit and miss, and the cabaret to be consistantly much worse, and very intrusive. On a busy night, the tables can get quite busy, which is great for confident players, but has unnerved newcomers.

Grosvenor Casino Blackpool is my favourite casino in the country as i really love the chilled out, relaxing atmosphere.
If you have never been to a casino before then you really should try and theres no better place to start than a grosvenor, even if its your local one.
At the blackpool one there is live music some eveings which is really nice, you can get lovely food in the restaurant or some great bar snacks if you want to be a little more informal. And alcoholic drinks are reasonably priced with soft drinks and tea/coffee been free.
There is a range of casino games to play Roulette, Blackjack, etc.
They even have the electronic roulette which is basically as it says electronic but hitched up to one of the tables with a camera and computer so you kinda playing the table but doing it via a computer screen. Which is kinda good if you want your money to last a little bit longer as you can get 20p chips on the electronic one and also maybe if you are new and want to get a feel for the game without been on the table.
overall a great night out can be had here even if you not really into gambling.