Durkl is a clothing company run by a few guys, some of whom live in Columbia Heights. They make a lot of 80s-influenced gear for dudes -- bright colors, tight fits, etc, and come out with a new line every so often.
They also have a pretty funny blog. The Washington Post Magazine had a recent article about where they work, a creative space at 4th and I NW called Gold Leaf Studios (which used to be called The Hosiery). Check them out.