There are 3 great open mics in Seattle/Tacoma area, put on by Victory Music - CHECK HERE. I am a "regular" at the Still Life in the Fremont area of Seattle. It's a funky little coffeehouse, great food, acoustics could be better (but not bad), great volunteers, and an appreciative listening audience. Every Wed evening, signup by 6:45, music from 7 pm to 9:30. Two songs or 8 min performance.

Cheers, S. in Seattle