The 66 Drive-In near Carthage, Missouri, opened on September 22, 1949, on U.S. Route 66 during the postwar rise of drive-in theaters, before local television reached the Joplin-Springfield area. Its original design used pole-mounted speakers for each car because radios were not yet common. As moviegoing changed, the screen was widened after 1953 for widescreen films, and a playground was added during the baby boom, reflecting its family-oriented role. After closing in 1985, the theater was renovated and reopened in 1998. It still operates and endures as a Route 66 landmark that preserves the appearance and social history of the drive-in era.