You can check out the RackSpotter map for images of bike racks around Arlington and DC. I’ve posted at least a couple hundred pictures by this point. I’m also getting to be an expert on bike racks in the region. I rarely use bike racks myself (because I use CaBi for commuting and for errands, and my personal bikes mostly for workouts where I start and finish at home), but now I’m learning about all the different types of bike racks and their variations.
For example, I’ve noticed that most of the bike racks in downtown DC (Farragut Square, McPherson Square) are of the bike hitch type. Those are a solid metal post with a thinner circle located near the top. The circle is bisected by the post. Other parts of DC have U racks, but the diameter of the bars can vary quite a bit. Many have a “standard” diameter of about 2″. But there are more than a few that have thicker bars in the 3 to 4 inch range. I don’t think there’s any way you would be able to fit a mini U-lock around those racks and your bike and tire. The mini U lock might not even fit around the bar on its own.
I haven’t seen as many of the artistic type of bike rack, where the artistic design can sometimes interfere with its use as a practical bike rack. There’s the corkscrew rack that we discussed on the RackSpotter thread. That’s located next to the Farragut North Metro station. There are a couple circular racks in front of the National Geographic headquarters where the circle is partially filled in with designs. One of the racks has nearly the entire circle filled in with a metal plate with an artistic engraving and cutouts, to the point where you could probably only fit one bike on that circle.
I had read a couple local articles about artistic bike racks, so I thought they were all over the place. They aren’t. I’d guess that the artistic bike racks only make up about 1 or 2 percent of all the bike racks I’ve seen in central DC so far (and I’ve seen several hundred this year).