Sosh San Francisco is a local event planner for San Francisco.
After you log in with Facebook, you are able to view tons of different events that are happening in the city. You can bookmark events to quickly view them later. Sosh San Francisco also supports personalized recommendations for new places of interest like restaurants or local shows.
Since Sosh San Francisco connects to Facebook, it will show what your friends are interested in. You can also share to Twitter, other iOS devices, or email.
The only problem with Sosh San Francisco is that San Francisco is the only supported city. It'll be useless if you are traveling to another city. If you like going out and exploring new places or events, Sosh San Francisco is a great tool.
Sosh San Francisco is best for socialites, but others may find it useful for exploring San Fnraicsco.