Sylvester Manor presents, “Long Island Music and Dance: An Agrarian Tradition.” 4 to 7 p.m. Musician/scholar Jeff Davis discusses the history of fiddle tunes and barn dances on Long Island. Potluck dinner and dance follows. Free. Bring a potluck dish to share and a beverage. For details call (631) 749-0626 or visit sylvestermanor.org.