Teas for three at the tea dance? (3-3-3)
I believe the answer is:
cha-cha-cha
But I can't explain it at all! Could you help me understand?
(Other definitions for cha-cha-cha that I've seen before include "Latin-American dance" , "Ballroom dance" , "Latin American dance - 1-2-3 rhythm" , "Latin American dance, sounds trebled" , "A Latin American dance, very repetitive" .)