The dance was created by dance studios including the Arthur Murray dance studios in the 1940s, based on the Lindy Hop. Lindy Hop was felt by dance studios to be both too difficult and too unstructured to teach to beginning dancers, but there was market demand for training in Swing Dance. The dance studios had initially dismissed Lindy Hop in particular as a fad. East Coast Swing can be referred to by many different names in different regions of the United States and the World. It has alternatively been called Eastern Swing, Jitterbug, American Swing, East Coast Lindy, Lindy (not to be confused with Lindy Hop), and Triple Swing. Other variants of East Coast Swing that use altered footwork forms are known as Single Swing or "Single-step Swing" (where the triple step is replaced by a single step forming a slow, slow, quick, quick rhythm common to Foxtrot), and Double Swing (using a tap-step footwork pattern).