In addition to the abbreviations, acroynms and emoticons (smiley faces) used in regular chatrooms, the chats in gamerooms use even more.  Here are some of the most common:

In many of the games, you'll find that the players have nicknamed the cyber dealers. In Pogo, for example, the dealer in roulette is Monica and in video poker it's Richard. 

Pogo is, in my opinion, the absolute best place for a combination of games and chat (or just the games if you prefer).  From dominoes to card games to casino games, you'll probably find the game you like at Pogo!