Are You on Craig's List?

SFgirl.com, posthoc.com, SFstation.com

At these Bay Area sites, you can read about bars, restaurants, stores, or local neighborhoods. Each has a unique style and attitude. If a site tells you that a certain club is great, then you may actually go there and connect with someone whom you've met online. These sites are about virtual and real-world communities.

sfmusician.com

This site combines a community of interest -- musicians -- with a place where people come together because they share geography. It helps local bands find musicians and advertise their gigs, as well as sell gear and exchange information about practice spaces. It's a useful, real-world site.