Irish set dance Church in the form of the Public Dance Halls Act 1935. The rise of rock and roll in the 1950s caused the popularity of set dancing to fade. However, in the 1980s a revival started and many sets that have not been done for forty years or more are being recovered and danced again. To start, four couples are arranged in the form of a square to dance with each couple being in the middle of the sides of the square. Both the eight dancers in the group and the dance itself are called a "set". The dance is a
Challenge square dance with more than 400 calls. C4 dancers typically know at least 700 calls. Challenge square dancing not only involves knowing many more calls, but is typified by the extensive use of Concepts, abstract and physical formations, "Phantom" dancers, and call deconstruction (such as Fractionalization). Some square dance calls are more complex than others, involving more series of actions and more abstract identifications of whom to do the action with. Challenge lists include more of these complex calls, but none are by themselves more complex than calls at the Advanced level. Much of Challenge dancing uses basic calls (such as "Right