 Couple numbering in a square dance set usually begins with the couple nearest the head of the hall (the side of the room containing the musicians and caller, or in the pre-caller era, the royal presence or other hosts or important guests).This couple is the "first" or "number one" couple.If most of the figures are danced between facing couples across the set, as in the 19th century quadrille and dances derived from it, the couple opposite the first is the "second couple".