Old people indeed. You'll be old one day sonny...
Anyway, I would have thought that clubs should be filled with people who like to go to clubs. Horses for courses. Different clubs for different people with different music styles etc. What's the problem?
Back in my youth I used to go to clubs which played rock music, filled with heavy rock fans, typically bikers. There were other places which catered for other tastes, like reggae clubs, disco clubs, oldie clubs (I went there too, natch).
Live and let live, I say.