San Francisco has its share of landmarks: The Golden Gate Bridge, Lombard Street, wherever Rice-A-Roni came from. But for white-knuckle competitive gamers, the city has just one true destination: Southtown Arcade — a tiny storefront by the Stockton Tunnel that houses Frisco's last outpost for hardcore gamers. So when… » 10/10/12 11:59am 10/10/12 11:59am