The placard outside the West Indies Club advertised the dance team as René y Estela, but the opening credits anglicized it as Renee and Stella. They were real headliners at New York's Havana-Madrid Club.
The elegant car that Nick and Nora ride out to Col. MacFay's estate in is a 1935 Lincoln. These were an expensive, low-production car, with only about 1,400 made that year. The major movie studios kept a number of expensive cars around for executive purposes, and they often did double duty as props as required in production.