That is strange. I do not see a friend request on the Amsterdam group. But maybe I need to be your friend on FB to be able to see the request? I know I've seen a couple in the past.
The group is not closed but like Michele said someone who's already in the group needs to add you. If you are friends with Jeri, Wen, Jill or Sleddog on FB, you may want to ask them to add you. I'd be happy to add you, but you need to friend me first.