The Roaring Twenties was full of fad dances. Some that endured—and therefore can’t be called fads any more—include the Fox-Trot and the tango. 
The Fox-Trot appeared about the beginning of World War I (called the Great War, since, obviously, no one at that time knew there would be a second war twenty years later). Its inventor was Harry Fox (real name Arthur Carringford ), a vaudeville dancer and comedian who introduced it in New York’s vaudeville theaters with his performing group, the American Beauties.
Try this short youtube video for a 1920s Foxtrot lesson. 
