I found a group which has no leader-
Many groups have no reason for being. Once the originator leaves nobody asks the staff to make them super admin. Another aspect is that once a group plays a team match or a vote chess game it cannot be deleted.
More leaderless groups.
http://www.chess.com/groups/view/waynes-world
http://www.chess.com/groups/view/the-order-of-the-black-knights
I found a group which has no leader-
http://www.chess.com/groups/view/superman