CoW has a WoW guild. I say that because not that many people know about it. We’re actually becoming a multi-game guild. Right now, most of us are in our 40’s and many of us also have DK alts.
We’re looking for like-minded people, namely people who like to play, group, and enjoy the game with a casual gamer’s play availability, to join us.
Even if you can only play a couple nights a week, we’d love to have you. We’re planning instance runs of both the older “classic” instances as well as the newer stuff as soon as we are level appropriate.
Holler!  The site is http://www.casualtiesofwar.com. It looks like it’s an WA-only site, but it’s not… ask to join the WoW guild and you’ll have access to the whole site. We’re working on a redesign to better reflect that it’s i multi-game site. The guild is on Rexxar server. It’s an Alliance guild (yeah, I know) and you can usually find me on Duis or Duisternis.