On Sunday, May 27, from 6:30 to 10 p.m., the Barnacle State Historic Park offers lessons in dances such as contras, squares, circles and waltzes. Music is by Keeping it Reel. The cost is $10, free for children younger than 10, and beginners and picnics are welcome. You’re advised to wear comfortable clothes and shoes and to park on the street or at a nearby public lot. The Barnacle is at 3485 Main Hwy., Coconut Grove.