These are two IRC channels set up to somewhat mirror Professor Messer's web chats. It's offered as a IRC based addition to the existing chats. Some people may find this easier to connect to, or more convenient to add to their existing IRC client, however we are not attempting to replace the excellent website that Professor Messer already runs.
For a friendly chat, talk in #beer and for certificate related chatter, talk in #certs.
If you're an existing IRC user then the details are:
For the original website please visit http://www.professormesser.com/