Everyone knows about the chat rooms. IRC is more like a chat central. How's this for a chat room: You type in your own comments, other people type in their comments. You can see their comments immediately, and they can see yours. Type as much as you want, or sit back and watch all the people talking about stuff.
Most IRC servers will let you create a room with any kind of name. Or you can join any room in progress. Most chat servers have hundreds of rooms, and even more users. We can recommend some IRC chat programs to use.
Windows 95/NT people can use a program called mIRC (507 kb).
We're taking suggestions for Macintosh IRC clients.
Your Service provider might not have an IRC client available for you to use, so you might have to do some searching. America Online, Netcom, as well as many of the other major online services have their own IRC servers. Contact your customer support to get an IRC server you can use.