Young kids, parents, grandparents can all join in together and enjoy getting fitter. Music is not something I use for choreography. I have a kind of freestyle teaching approach. Music for me adds motivation and enjoyment to a class. Besides great new classes for healthy people, water is increasingly being used for rehabilitation and prevention of injuries via cross training.
Music is very important.
It helps everyone feel lively, it adds variety, and so many types of music can be used. Rock for the aerobics, slow and mellow during the cooldown and stretch portions. One new trend I'v e noticed is that water massage is being used by the licensed massage therapists. And there are special water step classes. Far gentler on the knees than land.