A grindhouse is an American term for a theater that mainly showed exploitation films. It is also a term used to describe the genre of films that played in such theatres. Grindhouses were known for continuous programs of B movies, usually consisting of a double feature where two (and very often three) films were shown consecutively. Most of these films were made for Drive-in theaters as second and third features. Since most large urban areas did not have drive-ins, these movies were shown in older theaters that formerly featured burlesque shows which included "bump and grind" dancing, leading to the term "grindhouse." On the other hand, the producers, distributors, and exhibitors of the films were required to provide a large amount of low budget films for double features so would "grind"' them out like mincemeat. Beginning in the late 1960s and especially during the 1970s, the subject matter of grindhouse films was dominated by explicit sex, violence, bizarre or perverse plot points, and other taboo content.