Businesses should Reduce social contact by serving one client cohort per day

As non essential businesses open up after the first wave of epidemic, they should adopt customer binning.

Each day a different subset of customers shoul dbe serviceable.

For example, on Mondays, serve only customers whose last passport number digit is '1' or some other  but commonly acceptable standard. 

This reduces the probability of contact to a fraction of that can be 1/3 , 1/7 or even less if deemed useful.

It's also an easy-to-implement measure that assigns a "shopping day" for each household.