There are all types of initiations. Robbery, graffiti,violence all types of things. The gang structure varies, the largest gangs have as many as 2,000 members but break up into little cliques or groups. Lager gangs usually bring more territory. The gangs usually break up into branches to get more territory for drug trafficking.
Gangs usually have a leader or some one that takes control.
Highly structured gangs can be found all over the country, but are mainly found in New York. Create jobs for young people. Develop community programs in the arts, sports, etc. Make sure kids receive a good education. Prevent children from joining gangs by providing other challenging activities.