Lots of creative thinking goes on in the restaurant industry, making it difficult to narrow down a collection of great ideas to just 50. We came across hundreds of good ones in the 16 months since our last roundup. Some were interesting but too familiar. Others were whimsical but did nothing to drive sales. What separates the “good” from the “great” here is an idea that differentiates a business and moves it forward. See if you agree with our picks.