oooh first date that's tricky.
My first date ma bf took me for a meal in town, nothing to fancy chilled out so we could talk without feeling pressured (if ya get me) you could watch a film aswell, but if i wer you, id ask her if she wanted to go for a drink or for something to eat, but pick somewere near a cinema if possible, so that if that goes well, then you could ask her if she wanted 2 catch a film. jus make everything chiled out so she feels relaxed but make sure she knows that your more than jus friends going for a drink (you know what i mean).
hope that helps, good luck x x