What movie is this?

I watched this movie a long time ago, and i can't remember what it's called. It's a vampire movie actually. One scene i can remember is one guy who went to see a really "wise" old man; it was dark and he had to fight another guy from the rival clan. During the night, all the rivals arrive on motorcycles, and i remember seeing the old man spin a coin under a glass in order to stop the moon, thus extending the night so the vampiros could have enough time to fight. I just can't remember all.