Answer:
Subculture.
Explanation:
According to sociologists, a subculture is a group of people, generally from within a larger group or culture who have similar beliefs and interests. This means that the people in a subculture will have similar lifestyles, beliefs, wants, styles, etc.
In the given context, the group of artists dresses in tandem with each other, with the women "wear[ing] heavy, pale makeup, and both men and women have multiple piercings." This group exhibits interest in "discussing and creating art and music about death." The people in a subculture differentiate themselves from others.
So, this group of people with similar characteristics distinct from others are termed subcultures.