5. 1001 Club
Surely every group has an aim, we just don’t know about this one. The 1001 Club, was formed by biologist Sir James Huxley along with other royal figures like Prince Phillip of England and Prince Bernhard of Netherlands. Other than the group comprising of highly influential individuals having infrequent meetings, which are barely even mentioned in newspapers and magazines, there is little to no information on the 1001 Club. Now that is truly secretive.