I second a comment made below regarding https://matrix.org/ . I've used IRC for years and still use it almost daily - but come on Mosh + tmux + ec2 just to have permanent chat history? I seriously can't advocate this crap to anyone in 2016. It's too little, too late.
Well, yeah. When I was a teenager my group of friends used to use a QNet IRC chat for communications. Most on mIRC and such clients. Today it's pretty much all nerds. I do enjoy IRC, and pretty much live inside my tmux session, but I don't think I can recommend it to anyone who isn't already probably using it.
Probably says more about your social circle than IRC. There's a lot of channels and if hookers and blow are more your speed than say, gentoo, you can certainly find a channel primarily discussing them.