FiDi, Hayes Valley... hell even Tendernob and Mid Market in between Turk and Howard would be fair game for that kind of party. And of course, who could forget the Castro.
SF has been inundated with tech geeks from all over the world in recent years. The only areas I'd be fearing for my life cheering for the opposition after a critical game like that would be Bayview/Hunter's Point, the projects that run north of Civic Center, and Mission south of Valencia.