Johnson was an early Example of the Celebrity athlete in the modern era, appearing regularly in the press and later on radio and in motion pictures. He earned considerable sums endorsing various products, including patent medicines, and indulged several expensive hobbies such as automobile racing and tailored clothing, as well as purchasing jewelry and furs for his wives. He even challenged champion racer Barney Oldfield to a match auto race at the Sheepshead Bay, Brooklyn, New York one mile (1.6 km) dirt track. Oldfield, far more experienced, easily out-distanced Johnson, ending any thoughts the boxer might have had about becoming a professional driver. Once, when he was pulled over for a $50 speeding ticket (a large sum at the time), he gave the officer a $100 bill; when the officer protested that he couldn't make change for that much, Johnson told him to keep the change, as he was going to make his return trip at the same speed. Johnson was also interested in opera (his favorite being Il Trovatore) and in history — he was an admirer of Napoleon Bonaparte, believing him to have risen from a similar origin to his own. In 1920, Johnson opened a night club in Harlem; he sold it three years later to a gangster, Owney Madden, who renamed it the Cotton Club.