I don't understand why it hasn't been done already (the community of expats with dogs is so huge!). I've created a meetup for all dog enthusiasts in the Zürich area: http://www.meetup.com/Zurich-Dog-Walks-Meetup/
My dog needs more socializing and activities to tire her muscles and mind. It is easier to do it in a group
Please join if you are interested and let me know if you have any ideas or thoughts about this project.
I want to give it a try for a month, then I'll see if it's worth funding for longer.