Most frequently the company you will do the jobs for will have sample narratives on their site. Otherwise, I would contact my scheduler for the job so that I indeed was prepared to offer them exactly the level of detail they are looking for. While I could direct you to several sample narratives, they are company specific and you really need the specific ones for the company you are performing the job for.
Edited to add: If for some reason they do not provide you with a sample, be prepared to "tell the story" from arriving on site to leaving their parking lot with all timings in between, descriptions (and hopefully names) of people you interact with and the manager, estimations of how full the place was, all aspects of cleanliness and ambiance, what was suggested, ordered and served, what the dishes looked like, how they tasted, whether you thought they were good quality and a reasonable value, etc. etc.
Edited 1 time(s). Last edit at 05/20/2011 07:32PM by Flash.