For ballet, most of the time I'm wearing Selection Verte. The crisp citrus, mint, and light woods are so refreshing, and the whole thing just feels so classy and presentable.
Green Valley, Racquets, and Acqua di Parma (intensa) also fit well. I wear the AdP when I am dancing with my two Italian partners Blenheim even does the trick on occasion.
For salsa, though - you could pull off something a lot spicier! Jumping into a full-on tobacco scent like C&S Cuba or Aramis Havana might be a bit blatant, but I'm sure there are plenty of scents that would beautifully enhance a salsa dancing experience.