That's hardly a large increase. It means an increase of 0.27 for every $10. In practical terms it means that a $30 bill will now be $30.81, etc. If I'm spending $30 plus tip. I'm not worried about an extra 0.81 cents. Sorry, but I'm not seeing this as a hardship.
A dollar is still a dollar. People are on tight budgets, with the price of gas right now. All of the restaurants like Red Robin are located near one another. People will go where the best deals are, because the food tastes the same no matter where you go.