Columbia subject headings:
Popular culture--Germany.
Theater and society--Germany.
Theater--Germany--History.
Theater--Germany--Societies, etc.
Theaters--Germany--Berlin.
Working class--Germany--History.
Harvard subject headings:
Berlin (Germany)--Theaters.
Freie Volksbühne.
Germany--Popular culture.
Popular culture--Germany.
Theater and society--Germany.
Theater audiences--Germany.
Theater--Germany--History.
Princeton subject headings:
Popular culture--Germany--History.
Theater and society--Germany.
Theater--Germany--History.
Theater--Germany--Societies, etc.
Theaters--Germany--Berlin.
Working class--Germany--History.