Here is the link to the Seattle Yorkie Meetup Group (which meets every third Saturday at 1:30pm at Magnuson Park in Seattle, WA or at the Great Dog Shoppe near Northgate when it's rainy or during fall/winter months):
http://yorkie.meetup.com/258
There's a Meetup group for the Lakewood/Tacoma, WA area as well here:
http://yorkie.meetup.com/258
These Yorkie groups are a great way for you to socialize your Yorkie and meet other YorkieTalk members! Yorkie parents are very friendly and the kids just love to play with each other.
If you know of any more in the Pacific Northwest area, PM me and I can add them here!