So here’s the way the world (sometimes) works. Deysi Alvarez was born in El Salvador, raised in Colombia, and finds her way much later to Los Angeles, but the apartment she lives in downtown is right above Rivera, one of the premiere South American restaurants. She ditches her real estate career to learn everything she can about mixology, by hook or by bloody crook. And several restaurants later, here she is, in charge of Blue Tavern’s cocktail list (as well as several down in L.A.).