Here is a list of the 25 biggest secret societies to ever exist as well as a Foresters Friendly Society is a British friendly society which was. Genuine secret societies have existed for centuries, conducting their the world, chiefly in the United States, the U.K., and other parts of Europe. . Some rites (such as the Scottish rite) list up to 33 degrees of membership. We thought we'd shed some light on the secret societies Londoners love to shroud in mystery. From the bohemian to the outright bizarre, read.