Writing horror story, need info on circulatory system

Hey, I'm writing a horror story that includes vampires, and my general policy with accuracy is that, while my monsters can defy whatever laws of physics I wish for them to defy, I want to avoid any critical inaccuracies where the normal human characters are involved, so I have a question about the human circulatory system:

A few of the characters are friendly vampires who drink about a pint of blood from live humans, and they use their compelling gaze to make them cooperate and be calm, so their heart rate is normal. What would be the best place for such vampires to bite humans so they can suck out a pint of blood after making the traditional two-fang puncture without the wound needing any serious attention afterwards? I suspect that the neck would be a terrible spot for such vampires to use, what with the carotid arteries having high blood flow. Would the arm be better, in the spot where you get the needle in you during a blood donation?

Any help you can provide would be appreciated