Clark 54 drive-in http://clark54drivein.com/default.php, the old summer standby -- the "all American" Drive-in theatre.
My husband and I dated in the late 1970's when the St. Louis area was home to several (now dark) drive-ins. 1950's nostalgia reigned during this time, the movie American Graffitti followed by American Hot Wax and television shows Happy Days, Laverne and Shirley drove the nostalgic trend. From the 1958 peak of 5000 drive-ins less than 500 remain today.
Our favorite is located in Summer Hill, Illinois. This gem of days-gone-by sets atop a hill surrounded by woods. The consessions are cheap and the facilities clean and sanitary.
Locate a drive-in near you http://www.drive-ins.com/