Once I became a photographer, it stopped me being scared or intimidated by gangs of young men of whatever stripe. Initially, I could hide behind my camera but eventually I came to realize that if I was polite and friendly to them, then they probably would be to me too - a good life lesson.

That's one of the wonderful things about the whole process of photography - eye contact can be very revealing.

It's more about subtracting every single buck from the tourists that still flock there. Gentrification and the need for developers to maximize their profits from every square inch of the place means that there just aren't any scruffy little basement clubs left. Those scruffy little basement clubs were the areas lifeblood. Now, it's all penthouse flats and global brands. They destroyed the very thing that drew people there in the first place - it's superficial sleaziness.

To me, the counterculture was always what I grew up with the hippies in the late '60s. But, however you define it, it's really the excesses of youth and it's something that everyone goes through to some extent. Or if they don't, they should do.

I started out, in the mid-'70s, taking photographs of rock bands that I liked but not because I really wanted to photograph them. Initially, I was pretending to be a photographer, simply so that I could go up to the front of the crowd and be a bit closer to the bands. But, I found I was gradually developing an interest in the photos I took.

The reason why so many of my photographs in the book were taken in stairwells and corridors was that that was the only bit of spare space available and, in some cases, the only place where there was enough light to see anything. Even then, it was often so dark that I couldn't tell which gender my subject was (not that I particularly cared) and too dark, before the era of autofocus, to focus. I had to find a light (or carry a torch) and pre-focus.

Things are very different now because a lot of those little clubs don't exist. In Soho for instance, where nearly half my nightlife photographs were taken, it's rapidly changing. There isn't the same after dark frisson of excitement about the place any more.