Startup Idea : Guide of specific location

We have seen that the best information/review of an place can be always given by the customer who had gone there last. He/She can guide you with 1. Cost efficiency 2. Efficient way of handling 3. Lessons learn 4. Common mistakes 5. Parking 6. Any other So the idea is to give a platform to call directly to the people who have experienced an location ( only if they have offered to help) This not only offers in restaurants but also in offices , travel place , shopping malls , theatres pretty much any specific location