Croupier
A croupier (in European usage) or dealer (in American usage) is a person who takes and pays out bets or otherwise assists at a gambling table, often in a casino. In American usage, dealer may imply a card game, but this is not always the case. For example it is common to refer to a craps dealer[1].
In general, the croupier works only for their salary (and tips) and does not have a personal interest in the outcome of the game.
Training methods to become a casino croupier are different from country to country. UK based gaming schools are very strict and tend to form a professional figure, although British croupiers' salaries are significantly lower that their American counterparts. USA gaming schools usually train under a more relaxed atmosphere.
However, i could just be an ignorant, presumptuous yank talking complete bollocks based on a stereotypical view of the english.