Second Life provides great value of dance education. There are thousands “gestures” (meaning, pre-made animations by players) that features all styles of dancing. From pop dance to tango to Pole Dancing.
It's valuable technology because when you see dance movements by computer generated characters, you tend to get a better understanding of the body movements, in the same way black and white photography gets you to notice the composition of the scene. You can view the scene in any angle in real time, and it can repeat forever.
The following are old screenshots, made in 2007. The graphics and avatar shape have improved much since.
Dancing at a Blues Bar. The music is hot, and the girls are wild.
This bar is called House of Tunes, located at Whitlock 204,169,110. It features streaming live music.
Dancing in Second Life is a major activity, perhaps after shopping and sex. The majority of participants are women, as in real life.
Here's some excerpts from wikipedia on dancing:
Dance generally refers to human movement used as a form of expression, social interaction or presented in a spiritual or performance setting.
Dance is also used to describe methods of non-verbal communication (see body language) between humans or animals (bee dance, patterns of behaviour such as a mating dance), motion in inanimate objects (the leaves danced in the wind), and certain musical forms or genres.