The Son, which is a slower more refined Rumba was a favorite among the middle class Cubans. The wealthy section of Cuban society preferred the Danzon, which is an even slower Rumba using very small steps and more subtle hip movements. The modified version of the Rumba known as the Son was introduced to Americans in 1913. The steps for the Cha-Cha are taken on the beats accompanied by a strong hip movement as the leg straightens on the half beat. The Cha-Cha is a fun, flirty, lighthearted dance that gets its distinctive "cha, cha, cha" rhythm because there are 5 steps danced to four beats. Dancers work parallel with each other in well synchronized movements sometimes employing the "New Yorker", a step where one of the dancers steps across the other and checks to change direction. As fate would have it Rafael turns out to be a great dancer and becomes his father's best hope of winning a championship for his studio. The thing that makes this movie truly unique is that it is one of only a few movies that actually used ballroom competitors making for wonderfully realistic ballroom dance scenes. They loved this ballroom dance, which started out as a bouncy trot-like step that had been incorporated into the vaudeville act of Harry Fox. The Fox Trot has become one of the most loved ballroom dances to date. It is also one of the hardest to learn. There is also what is referred to as an American Smooth style of Fox Trot that differs in as much as the hold can be broken throughout the performance so you will see more open movements and underarm turns. Before the Hesitation, dancing the Waltz was pretty much an endurance test with the couples dancing in one direction then reversing direction when they became dizzy. The Waltz is an easy dance to master and has a grace and elegance that makes it wonderful to watch. The one thing that does cause beginners some confusion is that with a 3 count each bar is started with the opposite foot as the last bar. The music for this ballroom dance is usually provided by an orchestra that has a piano, guitar, violin, flute and a bandoneon (an offshoot of a koncertina, which looks a little like a small accordion). The bandoneon is essential to Tango music. The Tango has always been a very popular dance with Hollywood moviemakers.