With that said in the title it spells a dismal source for reading and results in lower book sales. I do think what you have to say is very important however the title should give off a more polished positive spin on your important message of telling people what's up with a business that has a failure rate of 80% during the first year of business.
For example by stating "fatal mistakes to avoid in the restaurant biz" or something of that style of verse has a more positive spin in which the title sounds like you are reaching out to help people with their restaurants or anybody that is considering of opening a restaurant as a business.
"Walking the straight and narrow path to restaurant success"
A guide to avoiding the pitfalls of restaurant failure
This title sounds like you are trying to help people rather then being cute with a funny or gloomy title. It gives the hope that you could be successful in the industry yet it also has a warning that the business does have fatal pitfalls and that one must walk a straight and narrow path in order to avoid closing their business. That is the kind of title you should strive for. I feel that I would be more inclined to purchase a book that sounds like it is designed to help me rather then scare me away from the industry that I love.
Anyways that is my 2.5 cents worth. I don't feel that creative to pop out anything else at the moment so good luck.
sincerely
David