McCarthy and Schiering has two locations in Seattle - Ravenna and the top of Queen Anne Hill.
We use the Ravenna store for nearly all our wine purchases. The staff is so knowledgeable and willing to help. They have always been right on target with recommendations when I describe what I'm looking for, and I'm not a wine pro! I use "regular" language to describe what I want. But their help has made me look like a real expert when I serve wine to friends....
They do free tastings every Saturday and often have the winemakers attend (especially for Northwest wines). They have also opened a bottle for me to try before buying, even when it wasn't part of a tasting. That's good service!
They have a Vintage Select buying club that gives you a 15% discount on all purchases (I think it's a one-time fee of $100 or so to join). They do a weekly email newsletter and quarterly letter too that describes upcoming releases, let's you buy wine futures, and so on.
They also helped me pick wines for my wedding, which was amazing because they weren't going to be the suppliers! I had to choose wines from a list that the catering facility provided, and the folks at M&S helped me choose which ones would be great wines at a reasonable price. They were very honest about which ones were being marked up too high. And they weren't even going to make a profit from helping me with this, other than having me be a loyal customer who recommends them on websites!