Own your Google Listing and your Yelp page even if you do not believe in the product people do use these search options when looking for a restaurant
Many restaurant owners believe that Yelp should be a four letter word but we are not here to have a debate on who likes or dislikes Yelp. The reality is that no matter what that these two restaurant search directories drive online traffic to the restaurants website.
To make sure the owner claims their google listing, simply search for the restaurant using Google. Make sure that the "Website" link and the "Menu" link are directing customers to the restaurants website not another companies website. This is also a great opportunity to see where the internet finds articles, directory listing, discounts and contact information for the restaurant
You get what you get from Yelp directly based on the amount of effort you put into controlling your destiny on Yelp, if you do not want anything to do with Yelp them move on, however if you want to know how to drive traffic to your restaurant then start responding to reviews.
Providing great customer service to your customers in the restaurant is just as important online. Be honest in your responses to reviews and include a less is more attitude with the goal that the restaurant wants this person to return to the restaurant. You do not have to respond to all your reviews but read them all because if there is a trend then its probably true.