Or do yourself a favor and don't. For casual group chat IRC blows xmpp out of the water. Every experience I've had with xmpp group chat has been subpar and frustrating.
Sure, but if it's company-linked, then you can use it for event alerts, automated contact list sharing when employees come and go, and other interesting features. The popular clients easily integrate with single sign-on type stuff on most platforms. You can point non-technical users at it and they understand. IRC is not like that.