[Emu]

I only had to read the first paragraph to know exactly how the story goes.

Vampire goes out for a night on the town to look for victim. He finds a female victim and nonchalantly begins bantering with her. Lady is unassuming, but maybe slightly suspicious. Vampire suddenly grabs her and bites her neck. Vampire leaves her body for dead, wiping off his mouth and nonchalantly walking somewhere else. Vampire nonchalantly walks into a rave consisting entirely of vampires where everybody is dancing to bad music. Vampire nonchalantly ignores the raveries and walks up to the bar/keg/alcohol wench and orders a drink. Vampire quickly finishes drink and walks out into the night. Vampire finds his way to the giant mansion in the outskirts of town where 200 other vampires live.

Well? Was I close?

Also, you can find something better to rip off of than Underworld, can't you?