While many restaurants may claim to serve homespun comfort food “just like grandma used to make,” at this Viennese café, the baked goods are made by real grandmas. Vollpension, or “full pension” in German, is a social enterprise that aims to give local retirees a chance to connect with people while earning extra income. The staff consists of a squad of Omas (grandmothers), with a few Opas (grandfathers) onboard for good measure. Order a slice of apple strudel or Sachertorte, Austria’s famous chocolate cake layered with jam, and the Oma…