Old Time Barn Dance, 7 p.m., featuring caller Paul Rosenberg and live fiddle band Tamarack, playing traditional music to benefit the Northeastern Cave Conservancy, at the Octagon Barn at 588 Middle Road in Knox (use Delanson 12053 for GPS directions).  No experience necessary, all dances are taught.  $10 per person ($5 per student), $20 per family, children under 12 free. Refreshments & light snacks will be served. (518)618-5376.