VIRUS SENDS A NATION OF RESTAURANT-GOERS BACK TO THE KITCHEN

Last Tuesday night in Tennessee, bluegrass musicians David and Virginia Blood were busy making sandwiches. In Pittsburgh, real estate agent Michelle Bushee was stirring a pot of homemade black-bean chili in her kitchen instead of shepherding curious buyers through potential dream homes. Marty Prudenti, whose nights are usually spent working backstage at New York City’s Lincoln Center, was in his Long Island backyard grilling burgers for his twins.

And in Texas, Babette Maxwell — who would otherwise have been