1. Inside this 3-bedroom, 2.5 bath pre-war cooperative, where George and Ira Gershwin occupied adjoining Manhattan penthouses in the late 1920s. The place was a scene of much partying and artistic creation and collaboration. 3. Inside this 3-bedroom, 2.5 bath pre-war cooperative, where George and Ira Gershwin occupied adjoining Manhattan penthouses in the late 1920s. The place was a scene of much partying and artistic creation and collaboration.