Urban contemporary is a music radio format. The term was coined by New York DJ Frankie Crocker in the mid-1970s. Urban contemporary radio stations feature a playlist made up entirely of hip hop, R&B, grime, electronic music such as dubstep, UK garage and drum and bass (often with hip hop vocalists or rappers), and Caribbean music such as reggae, dancehall, reggaeton, zoui, bouyon, and soca (In Toronto, London, New York City, Boston and Miami). Urban contemporary was developed through the characteristics of genres such as R&B and soul. Virtually all urban contemporary formatted radio stations are located in cities that have sizeable African-American populations, such as New York City, Atlanta, Chicago, Washington, D.C., Philadelphia, Detroit, Cleveland, Cincinnati, Dallas, Houston, San Francisco, Los Angeles, Baltimore, Memphis, Boston, New Orleans, Louisville, Indianapolis, Columbus, Oklahoma City, and Charlotte.