Visiting Zeitgeist is like dropping in on a biker neighbor’s house party: The metal is heavy, the service is gruff, and the Bloody Marys are famously stiff. Yet the outdoor beer garden is a terrific microcosm of the entire city; hipsters, laborers, bankers, and bike nerds literally rub elbows at rough-hewn communal tables, drawn by big, cheap burgers and a sense of perpetual summer cookout. If the “Tamale Lady” shows up with her home-cooked Mexican delicacies, invest.