I think it's good for seniors to exercise. Then, tango therapy is one of the good ideas to exercise. However, there are some people who are not good at dancing and who don't like dancing. Everyone has his/her own hobby, so there is no need for all seniors to dance.
My grandmother exercises by walking every morning and farming. She leads a happy and healthy life. When I interviewed my grandmother about this article(tango therapy), she ansewed "I don't like dancing, so I want to exercise by leading this life(walking and farming)."
Then, I thought people need to think exercise suitable for everyone by this article.