I think that's against the terms of use of the Google Maps APIs, FYI. You'd have to scrape their pages and risk Google's wrath.
Do you think this kind of insight would be useful?
Go and ask restaurant owners. They are your potential customers.
Or better yet, ask them what their problems are and work on those.
The best likely outcome is you gain experience trying to talk to potential customers. Some experience acting instead of imagining. Good luck.
I know a shop owner and he will tell you that unhappy customers are overrepresented.
He had a problem with someone and half his friends and family left bad reviews that were fake. The worst part is he didn't want to sell something to that person because the product had a problem but that person thought he didn't want to sell to him and got mad.