Come for a Bike Ride Meetup in Prague, Czech Republic on Saturday 6 April 2019. Prague to Vrané nad Vltavou, which is 17 kms each way. See route here https://goo.gl/maps/QCjmGNNK2BT2
Riding is all on cycleway and mostly right next to the Vltava River. It is a beautiful ride and flat with only a few small slopes. It will take 5 - 6 hours but dependant on how many stops are required.
This sounds like a great idea @TheEagleEye , why not to organize an official meet-up? Once your meet-up is approved, it will automatically appear as a post in the Meet-ups topic section for other Local Guides to participate. For tips on how to create a good meet-up, please check the following the How to Organize a Local Guides Meet-Up article which lays out the best practices.