Via a tip from one of our members, I just (just!) discovered the website of the Toggle Chain Tour in the UK. It’s a hub-geared bike tour based on the ever-lovely Lake Pepin Three Speed Tour.* They started it in 2010, just around the same time I put on my first three speed ride!
Alas, it does not look like they are doing a ride in 2015, but hopefully they’ll do something in the future. They do have an active forum, so it’s worth checking out.
*And yes, a writeup of said tour is still in the works. Still.