What is the main conflict in The Birthday Party by Harold Pinter?

Harold Pinter's The Birthday Party, was the playwright's first commercially-produced, full-length play. He began writing the work after acting in a theatrical tour, during which, in Eastbourne, England, he had lived in "filthy insane digs." There he became acquainted with "a great bulging scrag of a woman" and a man who stayed in the seedy place. The flophouse became the model for the rundown boarding house of the play and the woman and her tenant the models, respectively, for the characters of Meg Boles and Stanley Webber.