The live theatre scene is actually surprisingly good. There are a lot of big theatres in SF, but Silicon Valley has TheatreWorks. Check out the New Works Festival in August, which has new plays by some amazing writers. But the smaller theatres are really good too. Places like Dragon Theatre in Redwood City, Hillbarn Theatre near San Mateo, and San Jose Stage Company and City Lights in San Jose tend to do really good work, and ticket prices are incredibly reasonable. And they’re all located close to bars and restaurants to hit up before/after.