Club Groups are designed for clubs to create different segments of their members. A Club Group can only be created by Staff, and only Staff can post Group Alerts and Group Events. All members of a Club Group can post Group Messages. Also, Club Groups can be "open" Groups, meaning any member of the club can "join" the Group, by clicking "join" next to the Group name in the "Join a Group" list.
Private Groups are designed for members to create between other members, A Private Group can be created by any active member and can add any active members at the club. Any member of a Private group can post a Group Message, Alert, or Event.