How do you subculture?

To have a subculture, you first need to have a culture. A culture is usually noted as a group with the same beliefs, ideas, goals and much more. It can be seen as being the summation of ways of...

A group of people displaying slightly different properties within a wide-culture group are called subculture.

Minority inmates are better organized page 531 from textbookIntro to Criminal Justice 11th Edition

Minority inmates are better organized.

You mean like goth or punk? If that is the case, sure there are many urban subcultures like goths, "vampires" or "darketos", punks, "escatos" (skaters) and many more.