Kurt was in fact part of Grunge and in no way connected to the heavy metal scene. Regardless, I don't see a parallel in the dark sounds of metal and the world suicide rate. If anything metallers are the friendliest folk I have ever come across. Perhaps there is more of a connection in the Black Metal scene of Sweden, where a more sinister undertone took place. But again this was more about burning churches.

Anyway. Any music that makes you boogie has gotta be a winner pre-night out. For me, D&B, metal and Rock n Roll all do the trick.