The play house repertoire begins with classic drama plays, through to the works of present day play wrights up to the point of experimental forms of theatre. Modern classic productions from Shakespeare through to Schiller and Ibsen to contemporary works form the focus of the repertoire. The Grillo theatre is a synonym for young, unpretentious acting.

The neoclassical building is named after the industrialist Friedrich Grillo who financed the construction in 1887. The Casa studio chooses to host performances of works that address young people and whose attitude to life provides the fundamental themes.