Some notable forums in the washington area (not going to repeat what has already been said):
Seattle Airsoft Meetup Group - weely pick-up games in Maple Valley, although attends many other games held within WA and OR.
WART - holds organized events mostly in the Shelton area.
Praetorian Guard - Hosts monthly and some organized events in Pierce County and Fort Lewis Area.
Phantom Force- Based in Gig Harbor, they've hosted organized events before although haven't heard much from them in the past years. Disbanded maybe?
NATC – Based in Kitsap County, WA Famous for their JUNK YARD WARS (hosted at a junk yard) and LABYRINTH (hosted at a corn maze) series of events although not too much talk about them in the past few years. They do hold small skirmishes every once and a while.
Evergreen Airsoft – Based in Sultan, apparently they still host bi weekly events but I haven’t gone to a game there for years.
Spokane Airsoft – A bit far but heard great reviews of events.
There's a difference between a person who has a screwdriver and a person who knows what they are doing.