I used to work in sight of the ground on Trafford Park Road, as a southerner I had no allegiance but the work force were about a 50:50 mix of Mancunian and 'others'. It was generally the case that the 'others' were Man U fans and the locals were almost totally City fans.
Personally I don't follow football but if I had to pick a team it would be Spurs as they are the local team and my whole family are from the area.
The old pub attitude in east Anglia especially is a great thing, it is slowly being lost as pubs move to all food or these anonymous chains where the staff haven't got time to chat. Shame really, but I guess it's progress.