Note that Large circular sets, which are for variable numbers of Couples, are classified as Round the room sets.
Almost all Circular sets for Couples are formed by the Dancers being evenly spaced in a circle with the Men Standing on the left of their Partners. The Top couple of The set is nearest to The music. Couples are numbered clockwise starting from the Top and followed by any Couples inside The set. A few Circular set Scottish Country Dances, most notably those with one or more extra Couples Inside The set, involve Progression; if so, the Progression leaves a new Couple or Couples Inside The set to lead the Repeat. More commonly, Circular set dances are performed once through only; however, these may have a Chorus at the beginning and the end with a Dancer or a Couple or more than one Couple leading repeated sequences in between, usually without Progression, as for example in The Eightsome Reel.
At a Ball, the Top man in each Set should check that his Set has sufficient Couples (or whichever other Partner group is appropriate); if not, he should indicate how many more are required to complete his Set. He should establish the size and correct shape of The set if necessary, preferably by all Taking hands in a circle; if the ballroom is crowded, he should adjust the diameter of his Set and the space between his and the adjacent Sets to a fair share of the amount available, moving his Set as necessary. When performing a Square set dance which involves Dancers Leading Out of the Top and Bottom or Out of the Sides, it may be advantageous in a crowded ballroom to rotate The set through 90o, so that the Top couple is in what would normally be 2nd Place; this avoids competition for space when Leading Out. Ideally, the decision should be made by the MC but the Top man in one Set can safely do it if no other adjacent Set has changed.
One format for 3 Couples, the Celtic brooch set, is more genuinely triangular than the Triangular set though the Dancers are not all in one circle; the Ladies are equally spaced around a large circle, Facing In towards their Partners in a smaller circle Facing Out.