Go with an English Brown Mild...even though it's brown, it's a very light, refreshing malty beer. Not saying this is a chick beer, but I did make it for an event, and the ladies and bud lite drinkers alike loved it. If your lady likes brown ales with more malt than hops...this would be perfect for you to introduce her to, as it's something a little different than her fave, but still fits her tastes....she'll like it, and you will look like you're brewing up something for her
Solid advice. I'm nearing the end of my first keg of Mild right now. She'd probably like something like that. However, I do agree, this is more about the brewing process than the finished product.
Dinner will also involve delicious food, as per euge's suggestion. I mean, what good is a brewer if he can't cook a tasty meal to serve with his beer?!