There may be groups of kids fighting, but not necessarily a gang. Most often it may not be a gang, it's just a group of kids. It is not always easy to decide if an incident of violence is gang-related. A gang is usually defined as a group whose primary purpose is to engage in criminal activity.
Gangs exist in many settings and among all racial groups.
Also, there are many different types of gangs and different levels of gang membership. Because of this diversity, it is not always easy to recognize a gang. A wannabe gang member is more likely to pull out a gun and whack ya. They are more likely to lay you out flat because they want to be gang members so bad. Lugo also reminds us that there are many different kinds of gangs.