Street/Freestyle.

Freestyle dancing, sometimes referred to as street dancing, is a unique type of dance that is based on improvisation rather than the choreography seen in other dance varieties. As the era of disco died, freestyle dancing was born in the early 1970s when dancers began to show off their freestyle skills on the streets and in public areas. New York and Los Angeles were home to several important locations that contributed to the birth and growth of freestyle dancing, while Jamaica played a role in the incarnation of reggae seen in some forms of freestyle dance.
Today, freestyle dance has evolved to be edgier and harder and has given birth to several other forms of dancing like krumping, street jazz, breakdancing, and popping and locking.