If you are looking for a Halloween celebration here are my picks:
Museum of Fright Family Halloween
FRI Halloween treats, games, ghosts from aviation’s past and more at the Museum of Flight. (www.museumofflight.org).
Samena Spooktakular
SAT A monster bash for all ages! (http://www.samena.com/)
Autumnfest at Woodland Park Zoo
SAT-SUN Celebrate fall with tasty treats and entertainment (www.zoo.org)
Bellevue Square Halloween Family Fun Fest
MON Trick-or-Treating, Balloon tying clowns, Mad Science Booth (http://bellevuesquare.com/)
Crossroads Bellevue Annual Mall-O-Ween
MON Bring your little ghosts and goblins for a night of Halloween fun! (http://www.crossroadsbellevue.com/)
David's Picks 
Thanks for doing this David! I haven’t met you in person, but have enjoyed getting your emails each week for some time now. My best for your life after Microsoft! Look forward to your new posts. 🙂
David, thank you for what you do! I super enjoy your weekly picks, you made numerous weekends for our family. Hope you are happy with you decision!
-Denis