[Callers] ONS with a *tiny* inexperienced crowd?

I've agreed to an extremely last minute "Hoe Down" gig this Saturday for a local church, where I'm promised 25-75 people of mixed ages. No dance experience at all. I've reset their expectation to a family/barn dance - no cowboy outfits on the performers, no line dances. They asked for some squares - ok. If the crowd is really that size, I'm all set. Have the material, live music with a contra and squares, etc. fiddler & piano player. Good to go. My nightmare is there's only 5 people that show, say: a toddler, a teen, 2 parents and a grandparent. I have a few things I might do with that small number of inexperienced folks, but not enough to fill 2 (fun) hours. Any ideas on what you'd do/use in that instance? I'm all ears!