Chats in gambling is a good idea and a way to build relationships with fellow players.
As long as there are no signs of cheating say on a poker site, then I think this is a advantage to the players.
Some players gives insight on the chat box so i think this is a good opportunity for gambler to ask some others players for some tip. Though its quiet annoying to see some spam on the chat box but If its being used well, for sure that will be a great place.