About $20............... Seriously.
My most 'successful' dates were and are not dinner and a movie, or theatre or whatever. I'm a stone's throw from the Adirondacks. Nothing beats a nature date.........
Examples: Afternoon canoeing, day hike to mountain top or a boat ride on one of many lakes to look at the fall foliage. She's expecting a sandwich and soda for lunch. No way.... Even on the mountain hikes lunch is brie, bottle of wine, fresh fruit, little chocolate, some fresh baked bread (I bake my own - when the little chicky realized I spent an hour the night before baking bread for HER date, they get that little twinkle in their eye).
Add it all up... You have a nice appreciative woman, in a decidely romantic kind of environment, and, if you did your homework, a relatively remote site. And what the hell, the lunch blanket is already laid out....................
Worked in college, worked after college, and sure as hell works now...
Best $20 you ever spent...