I live in Manchester city centre and just on my way home, young people out in their hoardes to the clubs. I was out pretty much every weekend at that age.
I'm only in my 30s but most of my friends are married and/or have kids, meeting for a coffee needs to be arranged about 3 weeks in advance.
That age has its downsides for sure. I now have more money, I've got more life experience, I've learned a lot, and I'm happy in my looks.
There's just something about having it all to come, going to uni etc.