AKICODW/LJ: a Goodreads question

How do I leave a group on Goodreads that I have discovered I shouldn't have joined in the first place because they made me feel unwelcome with my very first post?

There doesn't appear to be a "leave group" or "unjoin" button anywhere on the group's page, or on my page or on the page listing the groups I belong to. Or an "edit groups" page. Or anything else anywhere else I can think of that would be remotely useful for the purpose.

I would like to get out of this group ASAP. Help?

ETA: Got it.