You may or may not have heard of Meetup.com - Its a web site that connects people with similar interests... for Business, hobbies and just about anything else.
People on this site join groups online and then the group usually meets once a month or more in person.
I've attended quite a few group Meetups and I've found it a great way to network with other people for business and social media marketing ideas.
The iPhone development group that I am part of is especially good. The turnout is very good and the people are very skilled.

ResMediaMarketing.