1) Ancient Greek dance 
The cordax (Κόρδαξ), was a provocative, licentious, and often obscene mask dance of ancient Greek comedy. In his play the The Clouds, Aristophanes complains that other playwrights of his time try to hide the feebleness of their plays by bringing an old woman onto the stage to dance the cordax. He notes with pride that his patrons will not fi...