I think it is completely possible to get a good blog going for your restaurant. The question is will you have the time to give it what it needs. You should share some good information for everyone out there. Specials, recipes, events, responses to negative reviews, an inside look at the restaurant dynamics, bio's, photos of dishes, who are your purveyors. A number of good ideas which I myself try to write about on my blog for
Aspen Restaurants.