There's one in my town in Colorado, and I try to go at least once every summer. I haven't been this summer, but last summer I saw a whole BUNCH of movies including Captain America, The Green Lantern, the latest Transformers, Harry Potter and the Deathly Hallows Part 2, and the newest X-Men (Origins, maybe?)
I don't know if it's like this at every drive in, but the one here plays two features back-to-back. It's super cheap, too! I love it.