What a wonderful place to dance! When: Social Ballroom Dance every 1st and 3rd Saturday of the month; West Coast Swing/mixed ballroom 2nd Saturday; Hustle/West Coast Swing 4th Saturday; Tango 5th Saturday. Most dances are preceded by a lesson. Where: The historic Schoolhouse at 10201 Colvin Run Road, Great Falls VA 22066, now called the Colvin Run Dance Hall. Dancers have been laughing and twirling across its 1200 sq ft, sprung oak floor for 81 years.