Washington D.C. and the companies in the NOVA area in general have excellent policies regarding electric cars. You can take the HOV lane to work, and there are free electrical charging stations at the office parks and in public garages in many areas (Reston, for example.)
I see multiple Teslas daily, both the Model S and the older roadsters. I occasionally see a BMW i8, and there's an i3 on my block. But, I've also seen electric prototypes on the roads around here (https://en.wikipedia.org/wiki/Volkswagen_1-litre_car) of which there are only a few hundred in the world, so YMMV.
And while there are plenty of other very nice cars around too, I don't see nearly as many exotics as you do.