I hang out on 3 networks. I am on Freenode for a few different projects I support and associated chat channels that I've been at for years. I am on StarLink, a small network, for the two channels associated with Alpha & Omega Ministries. I am on EFNet for one specific channel of a website.

I also use a local bitlebee server for instant messaging.

All in irssi with screen on a local server in my house.