Yes - there are a few operating in the area, and I went to one on Cape Cod this summer. Lots of fun, as I was led to believe by my mother! Apparently, she and my Dad (and her and other guys I guess too) were frequent fuckers at their local drive-in. They had it better in those days - the cars didn't all have bucket seats and no space to stretch and lie down ....
I went with a girlfriend from the Cape and some very low intensity summer flings we were "dating" --- really was fun!!! Saw quite a few pairs of boobs in other cars, saw some head bobbing, and did some of my own head bobbing! (My friend Lesley and I "traded" guys during intermission, and the guys did not complain! They each got at least two blowjobs (my guy got 3 over the 2.5 hours) - and we went back to Hardings Beach for some beach sex and skinny dipping after the movies.
I'm definitely a drive-in fan: sex in a car is fun, but sex during a movie at a drive-in is just so much fun - so retro - outside -- you can see some cars rocking - and you can hear some orgasms if you listen closely --- its great!
Haven't been to one since I was a teenager. There are one or two still around in our area. I have to agree with another poster's comment though, that most cars today are not comfortable for making out at the drive in anymore. I definitely would want to mess around for Old Times Sake, but think I'm too old to enjoy that now, from a comfort level. Fun thought though.