All my Groups at Meetup.com. My favorites:
Mashable.com: Social media, tech, business, entertainment, lifestyle. Procrastinate better.
Laughingsquid.com: Fascinating art, culture & technology.
San Francisco's Neighborhood Emergency Response Team (NERT): A free training program to learn the basics of personal preparedness and prevention. It's fun! Stockpile a hundred boxes of chocolate graham crackers if you like!
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