The way I would tackle this one:

The average age of your audience is around 63 years old. People are most interested in modern (or "pop") music, when they're around 18-25 years old. In the case of your audience that would be music from some 40 odd years ago. It is pretty save to assume that you can pick any hitrecord from 1965 to 1975 and please the croud with those songs.