This can be a Teacup Chain in which the four men do the ladies' parts (in some areas the Arky Teacup with four men active is called a Beer Mug Chain). It can also be a Teacup Chain in which the side men and the head ladies are moving or the head men and the side ladies or any other combination of sexes.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.
