Question

What is the setting for Casablanca? How does the film establish this setting? If you were creating a theatrical production of the play upon which the film is based, how would you establish the setting on stage?

Answer 1

This movie is set in the World War II backdrop. It is mostly illustrated through the dialogue of the characters because the main scenes occur in a nightclub. Rick and Ilsa discuss how their love was doomed because of the war. 
If I were to adapt the movie into a play, I would emphasize 40s music and costumes to ensure the setting is right.