Dave Mahoney, the only cantante to create 2 new Rueda structures: Infinita and Trébol. The minimum is 9 couples … or multiples of 12 or even 15 couples!

In Bratislava, Slovakia, Jaro forms first a 9-couple Trébol:

… and then a 12-couple Trébol to demonstrate partner-changing in this … Social Rueda Structure: