Arroyo Grande is a city in San Luis Obispo County, California, United States. The population was 17,252 at the 2010 census. Arroyo Grande is a small coastal town with historic, suburban, and rural elements located at 35Â°7â²15â³N 120Â°35â²12â³W / 35.12083Â°N 120.58667Â°W / 35.12083; -120.58667 (35.120878, -120.586799).
In many cases, national street gangs originated in major cities such as Los Angeles, Chicago, Philadelphia, Miami and New York, and they later migrated to other American cities such as Atlanta, Cleveland, St. Louis, Dallas, Memphis, Nashville, New Orleans, Milwaukee, Orlando, Houston, and Detroit.he earliest American street gangs emerged at the end of the American Revolutionary War in the early 1780s. However, these early street gangs had questionable legitimacy, and more serious gangs did not form until the early 1800s.
The American Mafia, an Italian-American organized-crime network with operations in cities across the United States, particularly New York and Chicago, rose to power through its success in the illicit liquor trade during the 1920s Prohibition era.