Dance is a form of non-verbal communications which is basically the movement of the body to the rhythm of music. It is commonly used as a form of expression, interaction among humans or presented in the context of a spiritual worship or performance. Humans do it for recreation and entertainment purpose as well.
Mr. B. said that in his younger days, he enjoyed dancing a lot. He used to go to some of the best dance clubs on Saturday nights. That was how he came to love dance music and aspired to be a disc jockey. He talked of the various places he went to and their distinctive features: Lost Horizon (the place where they have bubbles coming down on the dance floor for people to burst while they dance), Apres (the first dance club with lighted dance floor just like the Billie Jean video), Stargazer (the one with skylight where one can dance to the stars when it opens up at midnight), Isis (the one with Egyptian theme) and Rumors (the first dance club to use laser effects extensively).
"Did you know that the speed of dance music is in sync with the average pulse rate of the population?" said Mr. B.
From him I learned that dance music in the 1970's and 1980's were mostly 100 beats per minute speed or lower. In the 1990's and 2000's, speed gradually increased up to 130 beats per minute. Some trance and other electronic music even went beyond 150 beats per minute.
"People's heart rates are becoming faster and faster." he proclaimed. "That is why a lot of young people find it hard to dance to early music. It is not fast enough for them. Older people also find it hard to catch up to the beat of new dance music now."
I never knew dance could be such a complicated science.
Then I saw a clip of bears doing the Riverdance and thought that I should catch up quick!