Risers - inverted or upright - and flat bars seem to be a very East coast thing.

In my travels to Beantown, Philly, and D.C. I have seen a disproportionate number of non-roadesque handlebars.

Here in Portland, I see very few set up that way, in fact mine is one of the few that I have seen. To further emphasize my point, having sold a number of fixes on eBay every single one with flat or risers went to the East, save for Florida. All others, mostly flipped and clipped, went to the West.

Odd, but interesting.