So my first thought was... do restaurants really care about global warming or do restaurants care about their guests who care about global warming? The tough thing about the restaurant industry is that it's hyper-local. The people eating in your dining room are your neighbors in most cases. Large chains have a challenge to be both local and widespread in appealing to their guests, but at the end of the day it's all about attracting your neighbors.
What better way to attract your neighbor than clinging on to an issue that your neighbor cares about? But then you have to figure out a way to let your neighbor know you're supporting it.
It's easy for the big chains...
But even the independents can get in on it...
Taking a public stance or featuring a promotion on any issue can be risky, it has to be sincere and can't be too gimmicky.
Guests can look at it two ways, they can be cynical and see the restaurant promotion as a typical marketing ploy, but I think most will appreciate the fact that their neighborhood restaurant is bringing attention to a cause they support. But the ultimate success of any campaign will be determined by how well a restaurant knows its neighbors.