The 1949 opening and the post-war drive-in boom
The 66 Drive-In opened on September 22, 1949, in the middle of the most explosive period of American drive-in theatre construction in history. The post-war years between 1946 and 1955 saw drive-in counts in the United States rise from roughly 100 to over 4,000, and the businesses sprang up along nearly every major American highway corridor as automobile ownership exploded and returning veterans started families that wanted affordable entertainment. Route 66 — already the busiest east-west highway in the central United States — was a natural location for drive-in development, and at the peak there were dozens of drive-in theatres along the road's 2,448 miles between Chicago and Santa Monica.
The Carthage location was chosen for a combination of factors: a flat agricultural parcel large enough for a 500-car capacity, frontage on Route 66 itself so the marquee was visible to highway traffic, proximity to the Carthage and Joplin populations that would make up the regular audience, and affordable rural land prices. The original construction included the still-standing concrete-block screen tower, a small concession-and-projection building, the gravel parking lot graded to provide sight lines to the screen from every space, and the neon marquee out front. The total construction cost was modest by modern standards but substantial for 1949 — a meaningful family-business investment.
The opening-night film and the early-1950s programming have been preserved in Carthage Historical Society archives. The 66 Drive-In showed a typical post-war mix of Westerns, family comedies, romantic dramas, and the occasional B-grade science-fiction picture. Saturday nights were the busy nights and family attendance was standard — kids in pajamas curled up in the back seat, parents in the front, the concession stand handling a steady stream of popcorn and soda orders between the first and second features.