Bring your friends, family, and fellow dance enthusiasts for a night of lively old-time music with the Esteemed Clams, Margaret Mathews calling. No partner needed. No fancy footwork. Every dance is taught and called. Substance and fragrance free. Easy and friendly lessons start at 7:15, dancing at 7:30. Or come at 6 for the hour of mostly waltzing. Watch videos at cdrochester.org .