Comment by listenallyall

Restaurants, which is what your post is about, rarely advertise specific prices. Part of that is because a restaurant bill is comprised of multiple components -- entree, appetizer, dessert, beverage, "extras". Another part is that menus typically have dozens of options, another is that prices change often, and another is that many restaurants are local businesses with limited or no advertising budget. And a huge one is that restaurants that do promote low prices are often considered low quality as well.

In other words your point is pretty much moot because nobody is choosing a restaurant based on, veal parmigiana costs $25 at Villa Roma and $24.50 at Sicily Palace. But they very much might remember that Sicily Palace charges a credit card fee and boycott it in favor of somewhere else.