I saw all the bikes in Astoria - just kidding, downtown Portland, mostly specifically near or on the paths on each side of the waterfront/east bank esplanade.

Once I got into folders, I figured I'd see more here given the Brompton dealerships, (there are two, but I don't think the one sells any although they talk highly of them and the same models are always in the shop), proximity to Bike Friday's HQ, the area's high use of bikes in general and public transit use - especially the light rail.

I know they are out there, because I have seen well more than five at events like Portland Sunday Parkways, but I don't count that as being "everyday" use.