Always pay for the date/dinner - NO exceptions
But remember this - you should always be the one asking her out AND planning the date anyways
So you should never be shocked by the cost of the dinner since you obviously already took that into account when you chose the place
Remember the words of the legendary poster Pook - the girl is in YOUR world now - and chosing the restaurant and paying for it solidifes that
NOTE - you don't have to take her to an expensive restaurant - your goal is not to please her, but to please YOURSELF and have fun. I've done cheap, simple dates that ended up with simple dinners (~ $20 at a Thai restaurant) - but I've also planned dates that were a bit more 'upscale' - where I dropped $150 - try Hot Chocolate in Chicago
Open question to all - do you actually like it when a girl offers to pay?
I actually hate it when a girl offers to pay.
The girls I like and take out are always the hyper-feminine, super passive, dependent spoiled types - they just expect you to pay.