I wouldn't recommend bringing food to the movie theater.Notice how people overeat because they are so stimulated by the movie going on? if you absolutely must,bring a single coconut water.Or a small bag of carrot sticks.It's easy to over eat dates as well.
I agree with Tulip. It's best to avoid eating when you're distracted.
That said, if you're new to raw and worried that you'll eat popcorn or candy if you don't have something healthy munch on, bring some fruit. I used to bring a bag of grapes with me to the theater, but there are plenty of other options.
Orange segments would be very tasty...and might help drown out the stale popcorn smell. ;)