Charcloth i agree with the general advice given above; ask your audience. It is a very rewarding experience to sing in front of such an audience. on more than one occasion when I've done so, members of staff have wept, because someone who has not spoken for months, or has shown no sign of recalling past times, has come alive and either joined in or mouthed all the words. often the songong then prompts a remeniscence session. (I think that was why they were weeping! - could have been the quality of the singing)