I was sure I was going to get groans for that and they will all be from people living in or around Zürich...

When in real life a small group of people sharing the same interests (for example Zürich inhabitants, blondes, Audi TT owners, whatever...) joins up with a bigger group (for example Switzerland inhabitants, ladies who like to dye their hair, Audi owners...), you can then tell them a 1000 times that it doesn't make sense them staying together in their small group, that they should open up to the other people...If they don't want to change they won't.