I guess this truly has been the Summer of Death: The restaurants where both the Caesar salad and, allegedly, the nacho were invented have now joined the choir invisible. But maybe that’s not a bad thing. If they really depended only on turistas who are now scared away by swine flu and drug violence, Mexico is a better place without them. When the insanity subsides, visitors will be forced to eat like locals, not as if they were traveling in a T.G.I.F. Friday’s trailer. Kinda like what Mamma Leone’s demise did for New York. And Tavern is about to do. . . .