I lived in Seattle for 26 years, until five years ago, and I can tell you that in regards to classical guitar, you live in a great area. Stop by Rosewood Guitar in Greenwood (just below 85th). Great selection of guitars, sheet music, and instructors there. And do check out the Seattle Classical Guitar Society. The SCGS holds open mikes once a month and it's a great way to meet local players. There is another open mike in Bellevue, also once a month, that is a really friendly, intimate group.
If you'd like more info, please feel free to PM me.
“People may say I can’t sing, but no one can ever say I didn’t sing.” --Florence Foster Jenkins