I've always found movies awkward, you just don't really get to know a person sitting beside them in silence in the dark for 2 hours and you're not really sure what you can get away with
Take her for lunch, not dinner if possible. If you pick a Saturday or something where you don't have to get back to work, I've always liked lunches since it doesn't last as long as dinner, meaning if conversation runs dry you can get out of there quicker
Then go for a walk after. Oh and because I'm on CP, gotta add, bang her.