This includes 2 fundament techniques, namely improvisation and planned choreography. The fundamentals of improvisation can be easily defined as "impromptu" dance lessons. No specific steps are followed and choreographers base body movements depending on the type of music used for the dance. One of the main distinction between the two styles is that modern ballet focuses more on the movement of the dancers instead of the storyline of the performance. In terms of style, modern ballet does not focus too much on symmetry, as evidenced on how modern ballet performances seem to disregard the balance on the stage. Perez Prado then came up with the mambo dance style as he was figuring out what type of dance to use for mambo music. The mambo music and the dance appealed very well with the mainstream American crowd, hence, its popularity. The mambo dance and music was especially popular in New York city, as well as in Miami and San Francisco. You can even use the beginning part of the routine as a transitionary period so you can get the dancers into their dancing positions. Avoid dancing as a full squad, instead you can divide them into small pockets for more coordination and to make the entire routine aesthetically pleasing. End Just as important as the start is how you end your routine. Double Partner Dance In this type of partner dances, there are three persons involved and dancing together. It could either be one man with two women, or one woman with two men. This type of partner dancing is only done for social dancing with significant demographic disproportion amongst the two sexes. Today, this competitive dancing is introduced by various social groups to promote ballroom dancing to a whole new level. Television shows are known to use competitive dancing as a means to find new talents in the industry. Dancesport has also been introduced in social events, like college proms and athletic competitions.