It’s in the best interest of restaurant owners to keep their customers safe and to monitor employees of sickness. Unfortunately I doubt they have the foresight to do this, because they’re probably living on the edge as well.
But one incidence of coronavirus at their restaurant and their traffic will go to 0 immediately. The owner will go bankrupt almost overnight. Word travels extremely fast these days, especially over social media.
For example I just heard that Stanford hospital has a dozen confirmed coronavirus patients there. If a restaurant has a worker diagnosed no one will go there immediately.
A lot of restaurants are going to go bankrupt over the next 2-3 months unfortunately.