Last time I checked, dance sequences were not copyrightable. The physical description of
the dance sequence is copyrightable, and you couldn't just take the author's
published description and put it in your own collection w/o permission. You, on the other
hand, could describe the dance with a different notation.
In every instance I have seen, publishers of dance collections have gone the extra step of
getting permission from the dance author to include their dance. I'm not sure any of
those Creative Commons licenses map exactly to this situation.
Dan