How often do you go to restaurant websites vs. actual restaurants (not including Yelp or Google maps)? Truth is, they just don't matter. The cost of creating a website, even a $500 design over a CMS doesn't justify the cost. Also, a small business restaurant owner won't know how to operate a CMS. They just figured out email, remember? Worse, is that websites turn from beautiful assets to liabilities.
The nephew of some restaurant owner finally convinces him or her that the restaurant needs a website. The kid builds it for $100, everything is great. Until the business owner needs to change store hours.
"What's that password that kid gave me again? What do I do with that password? He mentioned logging in somewhere... Now that kid has a job at Google or is doing a startup and doesn't have the time to mess with $10/hr type of work anymore. Crap, now all my patrons are expecting me to be closing later and I am turning them down. What a huge pain, I have to go find a new web designer."
The solution needs to be the anti-CMS. Something that's not as simple as email, but as FAMILIAR ... Email is simple, but it was a huge learning curve for that small business owner. And learning something else just as simple will be a huge pain.