One of the best parts of the eastside is the triangle tour (Red Hook, Columbia Winery and Chateau Ste Michelle). I was introduced to Red Hook beer when I first got here, and thought it was pretty good. But then, I went straight to the source, and it's amazing! I really enjoy their cask and nitro beers on tap when there, and they have a good hummous plate.
During the summer, they have a big back deck with a ton of wooden benches and a bar. It's a really great way to spend an afternoon with a good group of friends. If you don't want to drink and drive (which is VERY smart -- Don't drink and drive people!!), you can always ride your bike there, its just off the Burke Gilman Trail. Now that's good planning!