People dance to celebrate man occasions like the birth of a baby, wedding, festivals, clubbing etc. There are different types of dance like tribal dance, folk dance, disco, ball dance, etc.
In Europe, people celebrate the beginning of summer season by dancing round the maypole.
This type of dance is done for fun where every one can join and have fun. During the 17th century the folk dances become quite popular. By 19th century ballroom dance got popularity which is still quite popular.
There is another type of dance performed exclusively for the audience which is known as ballet. It is a way by which people narrate a drama without words. It is similar to operas.
Below Dance info from Wikipedia (Read More):-
Dance (from French danser, perhaps from Frankish) is a sport and art form that generally refers to movement of the body, usually rhythmic and to music,[1] used as a form of expression, social interaction or presented in a spiritual or performance setting.
Dance may also to regarded as a form of nonverbal communication between humans, and is also performed by other animals (bee dance, patterns of behaviour such as a mating dance). Gymnastics, figure skating and synchronized swimming are sports dance disciplines, while martial arts kata are often compared to dances. Motion in inanimate objects may also be described as dances (the leaves danced in the wind), and certain musical forms or genres.
Definitions of what constitutes dance are dependent on social, cultural, aesthetic, artistic and moral constraints and range from functional movement (such as folk dance) to virtuoso techniques such as ballet. Dance can be participatory, social or performed for an audience. It can also be ceremonial, competitive or erotic. Dance movements may be without significance in themselves, such as in ballet or European folk dance, or have a gestural vocabulary/symbolic system as in many Asian dances. Dance can embody or express ideas, emotions or tell a story.
Dancing has evolved many styles. Breakdancing and Krumping are related to the hip hop culture. African dance is interpretive. Ballet, Ballroom, Waltz, and Tango are classical styles of dance while Square and the Electric Slide are forms of step dances.
http://en.wikipedia.org/wiki/Dance
