Just to give a bit of perspective on these points and bear in mind that I haven't seen the film.
Like the hero, I started going to Wigan whilst still a schoolboy and I appreciate what you are saying about the "fraternity and the 'living for the weekend' cycle" but that came later when I had some money in my pocket and more 'soul-mates'. As a schoolboy, hardly anyone in my school knew what I was talking about when I mentioned Wigan and soul music. Most of the kids were into Bowie or Heavy Metal. It only added to the mystique and glamour surrounding my chosen path. In the early days of the Casino there were not many of us yung'uns even though I lived in Rochdale, and so we would only meet on a Saturday at the bus stop to begin the long journey. It was pretty lonesome! When we got to the Casino we would meet older people from Rochdale who had travelled by other means but no self respecting eighteen year-old would give a lift to a fifteen year-old boy if he had a chance of taking a couple of birds with him - not many girls drove!! Later on when I left school and got an apprenticeship, I was able to travel further afield and , with my trusty scooter, travel to friends in and around Rochdale and support the local events that were starting to spring up.
On the drugs front, and again I haven't seen the film. I never took any drugs, having learned from my sisters imprisonment for drug offences at The Wheel. People took lots of drugs, starting with half a dozen chalkies and then quickly escalating up the chain. To a lot of my friends, drugs were an important part of the 'buzz' of the scene. They didn't just take them for nighters and they did experiment with lots of shit. Unfortunately the drugs took a few of my mates but, thankfully the majority were able to take a step back and survive.
These are just my experiences Dave, sounds like yours were a bit different but hey, can't wait to see the film
With respect,
Drew.