So where to start? For a sense of context, visit the original hippy commune of Haight-Ashbury (now, ironically, full of chic boutiques that would have produced mutters of 'commercialism, man' back in the 60s). Next stop might be The Mission, a neighbourhood that's become home to hipsters, and consequently craft beer breweries and achingly cool restaurants.
You can work off the over-eating by walking up the extremely steep (and winding) Lombard Street in the Russian Hill district made famous by Steve McQueen's epic car chase in Bullitt before hitting the waterfront to meet those iconic sea lions or browse the stalls at the Ferry Plaza Farmer's Market. Finally, there's a strong chance of bumping into a twentysomething tech billionaire in Mid-Market, home to Instagram and Twitter and now a major rival to Silicon Valley as the city reinvents itself once again.