I love everything East End Brewery stands for - local microbrew, green operations, active twitter and a website. You can even volunteer at the brewery for a truly immersive experience.
The place is hard to find and is not in the best neighborhood but if you turn right after the overpass/bridge and slowly creep along the building wall, you'll see the door and some people. And then you'll see the small sign.
It was actually pretty crowded inside - a room full of older men that looked like they're just coming back from work. Their growlers are a great deal, $12-15 for 1.5 liters of beer (with the growler, when you bring it back next time you get $3 off or so) You can also taste all the beer on tap, and the tastes are generous - try all five and you'll have a nice buzz going. In the back of the place, they have some bottles beers and merchandise (pint glasses, shirts, etc).