something the two of you are comfortable with is perfect for the first date.

my girlfriend likes for the two of us to go back to the restaurant that we went on our first date to, it holds sentimental value for her i think (aside from being very good! ) so keep that in mind, maybe you'll be coming back to this restaurant so pick something you definitely like.

i might be a little out of line with this suggestion because you seem to be either going on a more formal/dressy date than i usually do with my girlfriend or older than i am (19), but i saw "knocked up" with my girl last weekend and it was hilarious and she loved it, i recommend it.