It's actually a pretty nice ad, with great typography, as well as some great graphics explaining the reasons to go to a drive-in movie.
Of course, here's the trailer for Blood Alley (1955) starring the Duke (below). Strangely enough, I've never seen this one. Guess it's time to head to the library for the DVD, although I'd rather see John Wayne on a horse than as the captain of a ship.
It would be a couple of years before in-car heaters would eventually be featured at the Tower Drive-in.