I used to perform regularly at 4 Alzheimer's Centers near home. One of things I quickly discovered is that music is the last thing to go with this dreaded disease. I also discovered that the patients knew nearly every word of those songs that I played to them, and the loved the upbeat. Ballads and slow rock were a NO-NO, and would lull them to sleep in a matter of seconds. Some patients still had the physical ability to dance and quite often danced with the staffers at the facilities. Most importantly, you had to be a singer, and not just a musician. The vocals made a huge difference.
Glad to see you're out working, Terry,
Gary