Curzon was a founder member of the Society of West End Theatre Managers, along with Helen Carte, George Edwardes, Arthur Bourchier and sixteen others. At one point in his theatre career he had nine London theatres under his management. Some of his biggest successes as a producer and theatre manager included "Monsieur Beaucaire" (1902), "A Chinese Honeymoon" (1903), "Sergeant Brue" (1904), "The White Chrysanthemum" (1905), "The Girl Behind the Counter" (1906), "See-See" (1906), "Mr. Hopkinson" (1906), "Miss Hook of Holland" (1907), "King of Cadonia" (1908), "My Mimosa Maid" (1908), "Dear Little Denmark" (1909), and "The Balkan Princess" (1910; co-written by Curzon). A rare failure was "The Three Kisses" (1907). Many of Curzon's shows were filled with spectacle, using exotic sets, elaborate costumes and beautiful chorus girls. He also produced a number of plays starring Ivor Novello, including "Enter Kiki" (1923), "The Firebrand" (1926) and "Downhill" (1926).