App per business? Rejection?

We are trying to build an iPhone app for restaurants and wondering if we would get rejected if we built the app for each restaurant? The app would simply ask users for their email address, then require them to rate the restaurant and then in the future send them coupons through the app. Each restaurant wants their own app. I am wondering if Apple will reject the apps since we could be building these apps for 1000+ businesses?

Anyone have experience with this sort of issue/ solution?

Jason