Groucho Marx undistinguished vaudeville singing group billed as "The Four Nightingales". The brothers Julius, Milton (Gummo Marx) and Arthur (originally Adolph, but Harpo Mark from 1911) and another boy singer, Lou Levy, traveled the U.S. vaudeville circuits to little fanfare. After exhausting their prospects in the East, the family moved to La Grange, Illinois, to play the Midwest. After a particularly dispiriting performance in Nacogdoches, Texas, Julius, Milton, and Arthur began cracking jokes onstage for their own amusement. Much to their surprise, the audience liked them better as comedians than as singers. They modified the then-popular Gus Edwards comedy skit "School Days"
Marx Brothers stage during the middle of a Groucho monologue to see if Groucho would be thrown off. However, to the audience's delight, Groucho merely reacted by commenting, "First time I ever saw a taxi hail a passenger". When Harpo chased the girl back in the other direction, Groucho calmly checked his watch and ad-libbed, "The 9:20's right on time. You can set your watch by the Lehigh Valley." The brothers' vaudeville act had made them stars on Broadway under Chico's management and with Groucho's creative direction—first with the musical revue "I'll Say She Is" (1924–1925) and then with two musical comedies: