The group I play with plays at 8 nursing Homes and the VA Hospital every month and have for the past 15 years. we have found they really enjoy country Gospel tunes,Cowboy songs Hoedowns old time Waltzes Banjo and Mandolin playing.As previously mentioned by others in this thread these patients are not dummies and nearly all of them regardless how far their health has deteriated they somehow associate with music and you'll find many of them tapping their fingers or toe to each tune and as one person mention their eyes are glued to whoever is on the mike.One thing I think is very important whether you are singing a song or playing it on an instrument play it with sincerity and to the best of your ability and don't use these patient to practice on.Louie Roy