A great idea. Drinkexchange is the only group that comes close to InternetMixer. The Bay area's largest adventure and entertainment club. Get on the email list and you'll receive two e-schedules a week. One for adventure stuff and one for entertainments.
All events are either FREE or offer exceptional value.
Where Bay area professionals get connected' Random and diverse list of events and stuff in the Bay area, focusing on San Francisco. Every so often they throw a shindig to raise money for charity. Craigslist is very well known in the Bay area and is in the process of expanding their reach to Boston, New York and numerous other cities. Some money is channeled back into local charity. You won't find any advertising here.