>Just search for #gameofthrones and enter the chat to talk with others.

I invoke Poe's law:

https://tools.ietf.org/html/rfc2811#section-2.1

"Channels names are strings (beginning with a '&', '#', '+' or '!' character) of length up to fifty (50) characters. Channel names are case insensitive."

Traditionally, people use channel names like #foobar.

(if you wanna know what the other prefixes are for:

& = local to server + = no ops, no modes ! = "safe channels", a rather esoteric concept related to protecting against special forms of netsplit abuse. Barely anyone uses these or knows that this feature even exists. I hope they don't throw it out with IRCv3, and instead just make it less... idiosyncratic.