Yes, I attended a couple of the ABCE gatherings. They attract much the same crowd as the
Lake Pepin 3-Speed Tour, but not limited to 3-speed bikes. Anything British will do. There are often some interesting bikes there, rides around the Twin Cities area, and a swap meet where you can pick up vintage stuff. I know I have some pictures around here someplace, but I'll be darned if I can find them.