La Frontera Cantina Becomes Ultimo Lounge in Dupont Prince Of Petworth April 22, 2013 at 10:30am 1633 17th Street, NW La Frontera Cantina has reopened as Ultimo Lounge, Tapas Y Carnes, at 1633 17th St, NW. Here’s the new menu: click photo to enlarge click photo to enlarge