I go out to a club at least once a week unless I'm working weekends. My problem is when I'm there I don't really know how to approach anyone in this type of environment where the music is very loud so you can barely hear each other and everyone is constantly dancing.

On a few occasions I've ended up dancing with a few girls but after we've danced a bit it never really goes anywhere. Either the club shuts and they go home never to be seen again or they just disappear. On other occasions I've seen a girl I liked and have just felt too unsure as how to approach to go talk or dance with them.

Does anyone know of any resources or have any tips that could help me in this type of situation?

EDIT: I should maybe point out that this club I go to play Heavy metal, death metal, punk etc.