The type of dancing in the movie is West Coast Swing. The lead characters are named Jack and Jill. There's a type of competition native to West Coast Swing called a "Jack and Jill" competition. That's where you don't know your partner, and you don't know the music, and you have to make up a routine on the spot,
The choreographer, 8 Time US Open Swing Dance Champion Robert Royston, was one of Tom Malloy's original dance teachers back in 2000 when he first started dancing.