(Addendum to the previous post.)
As Solares drew to a close, I surveyed the last exercise: the performance of a simple rueda de casino using the "pak" vocalisation. Standing beside me was an observing participant who said something poignant:
Participant: "It makes me very sad."
Me: "What's made you sad?"
Participant: "After all these years of dancing, you've made me realise that I was doing it mechanically."
He'd understood the artistic expression individually possible in the rhythm of salsa; a fact reinforced when the rueda began to gain rhythmic dimension as casineros got their heads around adding the presence of the "pak" syllable in their rhythm.
I was heartened. You can't ask more from an exercise than for it to unveil the body of art.