Yes, there is! Seattle Net Tuesday brings together tech folks and people from non-profits, government, political groups, etc. Essentially, Net Tuesday is where do-gooders and techies meet for drinks.
Net Tuesday is the 3rd Tuesday of every month, hosted at the McLeod Residence. Here's their Ning page: http://seattlenettuesday.ning.com/
Starts at 6:30, wraps around 8:30. Suggested donation ($5) covers wine and appetizers.