I am a recent member of North Seattle Homebrew Club and have been having a great time at the meetings. Lots of good people and always a great evening tasting different beers. There are usually about 15-25 people and each person brings their latest brew (not a requirement though) to taste. You pretty much say a few words about what you brewed and everybody tastes, there are a few questions/comments and then we move to the next.
The quality of beer is always pretty dang good with some interesting stuff being brewed. If you have never been, you should definitely come, the worst that could happen is that you get some free beer.