This plugin should create a group legend and the groups should be clickable. When you click on a group if it is hidden it should tell the member that, if it is closed it should display all the members, if it is open (freely join or moderate new members) the user should be able to click a join button.
You should really be more specific when requesting a plugin.
This plugin should create a group legend and the groups should be clickable. When you click on a group if it is hidden it should tell the member that, if it is closed it should display all the members, if it is open (freely join or moderate new members) the user should be able to click a join button.