Java Junkie (1979)

Joe's girlfriend Betty has told him that she wants to call it quits, and he's been fired from his job. When he comes into his favorite coffee shop in the morning, he's lost his appetite. He just wants a cup of coffee - "pure, black coffee." The waitress is surprised that he's passing up breakfast, but she serves him a cup of coffee. Then Joe orders another cup. And another. And another. His hands are shaking, and the other customers look at him in alarm. Joe begs for more coffee, but the waitress finally tells him "there ain't no more" and says he has to leave.