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.
If every gamblers are too generous on giving tips and sharing their strategies that would be a good one but if they are just talking about their winnings, then I guess it would be hard to communicate on that chat box. On a gambling site, its hard to know whether they are saying the truth or not, so better not to believe on them 100% and don't rely on that but this is indeed a good idea.