How do I leave a group?

I am not new to the site, but I do have a problem I can't figure put.

Way back in 2008 I joined this group. I don't know why I did this. I think I was invited by a friend and I didn't realize it was for fandom. Usually I wouldn't join something like that, particularly since this one is about Twilight.

ANyways, now my profile says I'm in this Twilight related group, and i can't figure out how to leave, or at least get it to stop telling people i joined. Anybody know how to do this?

Go to the group/club page, look to the right of the screen, and look for "You are following [club name]" under the display picture. Under that, there should be [ unfollow ] in blue. Clicking that removes you from the member list!

I've tried doing that. Unfortunely what I've joined is not a club or a page, and it doesn't seem to work the same way. I think it is a feature that has been abandoned.

Ah, the actual original group. Then you are out of luck, unless somebody in dark green feels particularly nice and removes you from the group manually.

Drat. Oh well. At least I've made a public anouncment that I do not choose to stay :p Thank you for your help!