Ramping UpCompetition to be a stand-out tequila bar is fierce, especially in such cities as D.C. Last year, Jose Andres??? Oyamel Cocina Mexicana became the first restaurant in Washington and one of only 15 or so in the country to receive the Agave De Oro, the highest certification from the Tequila Regulatory Council of Mexico. (Establishments are judged on staff training, proper storage and displ