Our drive in is pretty good, there are quirks that are irritating (the guy who owns it likes to power trip and goes around the lot on his golf cart complaining about any little thing he can find to complain about for instance), but overall it's a great throwback and is a great price. They charge $6 per adult (less for kids) for two movies making it only $3 per movie. Now they typically tie a more popular title with a less popular title (this week it was Iron Man with Drillbit Taylor), but we still *typically* stay for both movies.
Their food is really reasonably priced and once school is out on fridays for the kids they will have organized games and a DJ. Most poeple could take a family of 4 to our drive-in and see 2 movies, have dinner and snacks and still only spend about $50 or so. We don't buy their food though anymore because we're eating healthier....we only got a popcorn and drinks. However they let you bring in your own stuff as well so I brought healthy snacks. In the summer a lot of people bring their own coolers and such.
There are less than 400 drive-ins still in existence at this point

.