Cities are requiring restaurants to ask staff and customers for proof of vaccination. Will this be a trend?

If there is one city that is synonymous with restaurant dining, it is New Orleans. If there is one city that is synonymous with an anything-goes attitude, it is New Orleans. And if there is one state that is synonymous with COVID-19 right now, it is Louisiana (OK, and Florida and Texas and Arkansas).

So now imagine New Orleans eateries having to ask customers for proof that they have been vaccinated or to present a negative COVID-19 test. The mayor ordered yesterday that everyone indoors at restaurants must wear masks. Jazz Fest has...