The punk subculture, which centres on punk rock music, includes a diverse array of ideologies, fashions and forms of expression, including visual art, dance, literature and film. The subculture is largely characterized by anti-establishment views and the promotion of individual freedom. The punk subculture is centered on a loud, aggressive genre of rock music called punk rock. It is usually played by small bands consisting of a vocalist, one or two electric guitarists, an electric bassist, and a drummer.