I think Tango therapy is good for seniors. There are many ways to help senior from senility, for example, origami or climbing a mountain or haiku. However, senior can do these things by themselves, there is no touch each other. I think it is more fun and effective to contct mutually because we can feel we are alive and see daily physical condition. One may find pertner's health difference or poor physical condition. It is also good to communicate with the opposite sex. Setting heart pounding is good thing to live, it's important. By touching each other, seniors more likely to trust each other and tell their problem, as a result they have less stress.
Though there is problem of negative feelings caused by touching body, if seniors feel unpleasant they should tell therapists and do other therapy. Moving body is important to prevent senility or Parkinson's disease and then contacting with each other is also important, I think. From these, this is good idea.