To the majority of people whom have attended real clubs, go for the music, to get dressed up to impress not only others but themselves.
Many clubs are just institutions to carry on drinking after normal club closing time and to pick up members of the opposite sex.

Real clubbing....IS.... music, dancing not what has been described on here. This is not just my opinion, there are many clubbing web pages, and you will find it hard pressed to find a description of what is described on this forum.
Have you ever been to Ibiza? granted the drug scene is far to prevalent there but it is all about fun music and dancing, not about picking up women!