Website for estimating cost of resturants

I was wondering what it would cost to go to a place like 21 or the Rainbow room for dinner. I was wondering if there is a website that has approx price ranges for resturants? I was able to find the cost by Googling different resturants but I was wondering if anyone knew of just one site.

If not it’d be kind of a good idea to start one I’d think


I think many restaurants have websites that include their menus.

Yelp, among others I’m sure.