Dealer

A casino employee who operates table games, usually distributing the cards, or places bets and pays out winnings at a craps table. A croupier. Many online casinos offer live dealer games to their customers. The dealers are broadcast online in the real time dealing cards or spinning roulette.

Examples: 

A poker dealer distributes cards to players and manages the action at a poker table.

Many online casinos have live dealer games.

Blackjack is a comparing card game between a player and dealer. The players compete against the dealer but not against any other players.

The dealer has Blackjack. 

Never ask a dealer for advice.

I feel bad for dealers sometimes, when they have to watch people's tantrums. People throw cards at dealers, and dealers have to take it, they cannot fight back.

I always tip the dealer, even if I lose.

Synonym: Banker, Croupier