of, relating to, or established by institution. 2. of or relating to organized establishments, foundations, societies, or the like, or to the buildings devoted to their work. 3. of the nature of an institution.
Contra dance. Contra dance (also contradance, contra-dance and other variant spellings) is a folk dance made up of long lines of couples. It has mixed origins from English country dance, Scottish, French dance styles in the 17th century, with strong African influence from Appalachia.
Otherwise, the only real answer to the question What is contra dance? comes when you try it. Check out Charlie Seelig's Contra Dance Links to find a dance in your neighborhood.