about: https://swungover.wordpress.com/2013/09/23/swing-101-etiquette-floorcraft/

etiquette version 2: http://us1.campaign-archive2.com/?u=8819953b47177f804b6531401&id=ea1d49c8e4

etiquette version 1 http://www.holylindyland.com/wp-content/uploads/2014/03/Lindy-Hoppers-etiquette.jpg