NamelessTreasuresFeatured By OwnerNov 20, 2012Hobbyist Artisan Crafter
As far as I've found with the internet, you'll have to go and find adult topics to find adult chatters. (I frequent the WitchesChat, which although they do have a few teens on it, everyone is mature and can keep a good conversation going) Mostly I find that things that are usually more moderated (Scrapbooking chats, religion chats, etc) have more mature and straightforward people.
Sadly, I haven't found any general chat places without any real underlying topic that aren't crawling with trolls, but hopefully you find something that piques your interest.
Well... different platforms attract different types/ages of people.
IRC is one of the oldest chat platforms with hundreds of thousands of users logged in at any moment. If you have ever looked around IRC and then look at Yahoo! chat rooms, which is another highly populated interface, you'd see a huge difference in atmosphere.
For in-game chat, such as Kongregate, versus a more adult-themed and advanced platform such as Secondlife. They're both games but attract a different type of person. Same with other downloadable MMO's like WoW and Gunbound are totally different demographics. Generally.