Experimental plugin to give more "control" to group admins on their public group. Public groups can become a bit more "protected" and can require a user :

• to join the group to be able to see all areas of the group
• to send a membership request to be able to join the group

Group Admins can create a custom group's front page to inform a "not yet" member about their group. They can also control the group's components that will be displayed to "non members".

You can watch a demo of it here

• Built in WordPress 4.0-alpha-28611, should be ok with 3.9.1
• Built in BuddyPress 2.1-alpha, should be ok with 2.0.1

• Before activating the plugin, make sure all the files of the plugin are located in /wp-content/plugins/altctrl-public-group.