All other entries I have seen for the definition of 'townies' seem to be describing chavs. Townies do not wear tracksuits or burberry, they wear what is in fashion yes, but in a less noticeable and in a more decent way then chavs. They do not mind people who are not townies and will be mates with goths, grunges, skaters etc.
Chav: Oh my God you stupid goth I'm gunna kick the shit outta you and I don't know you!
Townie: *ignores goth* OR if they know them
Heya you alright?