If you are unsure what IRC is then please take some time to watch the Youtube video below and there are others.
I am active on IRC (freenode) mostly either in
#dcglug – Channel for the Devon and Cornwall Linux user group
##zleap – My own personal channel
The main advantage with hanging out on Freenode, is that if you want help with a specific topic there is a chance there is a irc channel to suit.
The chat menu link on this website goes to a web interface to Freenode which then connects to my channel ( ##zleap ), other than me, zleap you may see chanserv, other than that, it is pretty quiet (at the moment at least).
Servers I frequent
https://freenode.net/ – Various – please see above
https://www.oftc.net/ – a few Debian related channels
http://www.spotchat.org/ – Linuxmint-help