but alas, I was wearing a pencil skirt which is fine on my loop frame, but wasn't going to work with these bikes- I tried, and was so so sad that I couldn't try them.
These bikes are really fabulous- unfortunately I didn't have a real camera, and I don't think the iphone camera does them justice. I had a great conversation with Dave Toppin, who seemed to be running things, and who was a font of knowledge.
His bike is a Rudge (yes, they're that old)
The tires are solid rubber, and you have to have a special machine to put them on. All the parts are nickel plated which gives them a lovely golden glow.
The system is direct drive- the original fixed gear- that's why the wheel has to be so big- you don't have any mechanical advantage provided by gears and such.
There were a couple of kids riding them around with great expertise (pulling wheelies) - they looked like they were having a blast.