We have one in our area that continues to stay open. The town where it is located has a population of fifteen hundred but draws from a large area within sixty miles.
When I was youth, we had two drive ins to choose from in the local area, The Hill Top and the Rancho. The Rancho had a neat cowboy neon sign on their marquee.
The Hill Top lasted a little while longer by opening up on weekends as a flea market. Located next to I-80, the flea market was big for awhile but it couldn't keep the place afloat.
The land that the Hill Top was located on was eventually sold to developers for a shopping mall.