For a start, it sings rock and pop music. There are no pre-requisits to joining, it is open to all teenagers.
It is a place where youth can not only learn to express themselves, but also learn new skills and abilities. In every concert there is usually somebody singing a solo, playing an instrument in the band, or even conducting the choir for the first time.
The dramas and dance are written by the teenagers themselves. The concerts are a means to an end, not an end in themselves. Even so, the energy and enthusiasm that the teenagers put into the concerts means that they are of an unusually high quality for an “amateur” choir.