Blue Starlite Drive-in is a small Drive-in theater that recently moved to Meuller Park. There is a "walk-in" section that you can bring your lawn chair and watch from there instead of in your car- a bit more social that way.
Among a bunch of great movies coming up is "Planet Terror"- one of the Grindhouse movies made by directors Quentin Tarintino and Robert Rodriguez. It's a cool zombie flick with lots of action and a few laughs, also features Rose McGowan with a machine gun for a leg. that's right.
http://www.bluestarlitedrivein.com/ (sometimes this website is a little kooky)
https://bluestarlitedrivein.vbotickets.com/events (ticketing website)
I'm pretty sure you can bring beer:
Beer Rules: http://www.bluestarlitedrivein.com/#!facts/co3w
You cannot be NOTICEABLY intoxicated, which I hear as "don't be obvious about it"