I seem to recall a commentary on a derby, not too long ago when one of the commentators referred to the rags as 'Manchester' and the other commentator said something like 'which one?'
I was living in Stockholm around 5 years ago, popped out of the local hostelry for a smoke (don't do that any more, smoke, that is) and there was another Brit visiting, between drags he asked were I was from, I replied 'Manchester', he then asked whether I was red or blue, I replied 'City', he then proceeded to go off on one, called me arrogant, said we aren't the only club with City in their name. I replied that as we had already established that I'm from Manchester, there wasn't any need to clarify the fact any further. Turned out he was a Norwich fan, I suspect he had a multifunctional green and yellow scarf.
P.S. I'm from Salford...