We go to the theatre to see a play, that is to say, a performance given by actors and actresses. A play of a serious character, dealing with important human problems is called a tragedy. A play of a humorous, lighter character is a comedy.If we want to go to a theatre we buy tickets at the box-office and show them to the attendant at the entrance. In the building there is a hall, a large foyer and a cloak-room where we leave our overcoats, hats, etc. The audience can walk in the foyer in the intervals. Many doors lead to the auditorium consisting of stalls, boxes and balconies.We, the playgoers demand an interesting plot, good acting, impressive scenery — that is two hours of good entertainment.