Soviet Union | Major League Baseball | National Football League | European Union | Union Army | National Hockey League | rugby union | UEFA Champions League | Union | Premier League | Australian Football League | rugby league | Major League Soccer | National League | League of Nations | UEFA Europa League | American League | Canadian Football League | Arena Football League | the Football League | International Telecommunication Union | American Hockey League | trade union | Marylebone Cricket Club | Bulgarian Hockey League | Football League First Division | Union (American Civil War) | Lancashire County Cricket Club | Football League Second Division | Union Pacific Railroad |
Paine was a member of the Union League, the Merchants, and the New York Athletics Clubs.
Warren was also a member of the Michigan Historical Society, the Chicago Historical Society, the Wisconsin Archaeological Society, the Union League Club, and the Geographic Society of Chicago.