What are some fun, cool, or unique things or places in the Bay Area for 18-20 year olds? I'm interested in just about everything such as nightlife, shopping, amusement type attractions, restauants, hiking, sports of any kind, and sightseeing/views. I've lived in San Francisco for about half a year now, so I know all about the obvious areas. I'm looking for specific things/places that would be fun. Ex: specific nightclubs that allow 18+, specific sailing company, specific hiking trail in Muir Woods etc. Thanks in advance!!!