Audience participation is always a good thing, especially with the older crowds. In some of the nursing homes it's difficult to get them up to dance because of their various health problems, but you can always get them to do sing alongs, which in most instances, they all love to do. Sounds like you're on the right track Mike.
Good Luck,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)