There's one I see in Cambridge which, frankly, scares me. It's a white, ladies/step-thru with such a monster of a twist somewhere in the frame/forks that the front wheel is several inches off-line from the rear.
It's not always there, and when it is there, it's locked, so someone clearly uses and values (!) it.
I'll try to get a photo when I next see it. If anyone else fancies shooting it*, it can be found outside the Giraffe Cafe, behind the bus station.
* I mean photographically, but "putting it out of its misery" may be more appropriate.