In the 1880s, The Thirteen Club among whose members included five U.S. Presidents as honorary members, was formed to counteract the wide-spread superstition of “13 at the table” being unlucky. It is said that if 13 people sit at a dinner table together, one will die within a year of the meeting. The club’s founding members met on the 13th of the month for a dinner served to 13 people. By 1887, the club had at least 400 members, some of whom included William McKinley, Grover Cleveland, and Theodore Roosevelt. Take that superstition.