Our team has had a lot of ideas about marketing, but we've been a bit disorganized regarding who we will focus our attention on: tourists or locals? Tourists are more likely to eat out but will probably not return more than once. Locals have the potential to be repeat customers but they often cannot afford to eat out. This article describes ways to market towards customers.
It talks about the importance of social media and reviews. Rather than a small group of us marketing the restuarant, we should get the customers to market the restuarant. If we add a blurb like "Make sure to review us on Yelp!" we will firstly get customers aware of our Yelp page, but also get them to market for us. A way to increase spending could be telling them they get a free dessert every three times they visit. Whatever we do, we need to make sure people come and keep coming.
http://www.rewardsnetwork.com/blog/the-only-4-ways-to-increase-restaurant-sales/