Keeping it short and sweet - Perpetua is a clan that focuses on making sure that all of it's members have fun, and that's it really. Although with Update 8, we will also be focussing a lot on the dojo (although I guess most clan will be doing that :P)
If you want an invite, just go to the recruitment post on the forums, leave your in-game name in a comment, and I'll pop you an invite
It's really that simple :-)