 The first and second couples constitute the "head" or "top" couples (or the "head and foot" couples); the third and fourth couples are the "side" couples.In the 19th century quadrille, the third couple is to the first couple's right.In Irish set dances, the third couple (sometimes termed the "first side couple") is to the left of the "first top couple" (the couples facing the first top and first side are the "second top couple" and the "second side couple" respectively).