Bethesda Business Networking Groups

I'm investigating the different business networking groups in Metropolitan DC and Montgomery County. Here's a bunch I found today:

• http://www.bethesdabusiness.com/Home_Page.html
• http://bethesda-business.com/about.html
• http://www.ccabp.com/
• http://bnibethesda.com/
• http://www.beltwaynetworking.com/

Most of them are BNI (business networking international) groups, but at least one or two use their own format. I've been a member of BNI groups in the past and they were fine, but I'd like to try something different.

Also, here's a big list of groups in the DC area:

http://www.washingtonnetworkgroup.com/index.php?tg=articles&topics=39&new=0&newc=0