A Dallas-based mobile app called TangoTab is attempting to tackle hunger through a monthly event called Feed The City. The first San Antonio event will be held in commemoration of National Hunger Action month on Sept. 21 at Bar Louie at La Cantera. TangoTab works with over 100,000 restaurants across the country, including local restaurants like Ostra, The Esquire Tavern, Il Forno, and Golden Star Cafe, as well as restaurant chains like P.F. Chang's, Taco Cabana, Subway, Whataburger, Starbucks,...