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:
The Screen On The Green every Sunday. The Rex closed on 20 June 1970. The cinema re-opened on 13 September 1970 as The Screen On The Green after being purchased by Romaine Hart's Mainline Pictures Group. It was comprehensively refurbished and modernised in February 1981 to plans by architect Fletcher Priest, one of the main modifications being the creation of foyer space, something the original building never had. This reduced the seating capacity to 300. It was operated as part of the small independent Screen Cinemas circuit until 2008, when the circuit was sold to the Everyman Media Group. In December 2009 the cinema underwent