I'd also be interested in this. I'd particularly like to hear about local mod stuff.
In my school (Kenton) (I'm 23) you were just asked if you were a charva or a hippy. Charva was basically the mainstream, 'normal' or a hippy (a significant minority, and bottom of the food-chain) - which people seem to call 'moshers' in most other parts of the country, who were basically the people that wore Offspring hoodies, baggy jeans with chains on etc. I wasn't into either - thought the hippies were mostly lame and the charvas crowd-followers and largely dickheads. It was almost a one-way system of charva on hippy attacks. If you had no obvious symbolism - rockports, berghaus etc., your allegiance was shown by how many bag straps you had on your shoulder - 1 meant an easy life, 2 (=> hippy) might mean getting hassled.