You sit down at the bar next to one of the singletons. He looks you over and offers to buy you a drink, making eye contact. It's easy to roll this one, and after enjoying the 7 and 7, you lean forward and suggest something quietly, then get up and head towards the bathroom. After a moment or so, he follows. You gaze him again to be sure he's under your control, tell him to drop trou, suggest that he'll wake up and feel ill, and then for the femoral there. Instinct - somehow, you get the impression that bite marks on the neck is something people would notice.
Surprisingly enough, the wound starts clotting after you pull away. After dragging the man onto the toilet, you straighten up, take the $24 from his wallet, and head back out. You finish your drink, noting that you're still hungry enough to drain a person whole, but that you don't need more if you want to wake up tomorrow night. Of course, given that you'll have about 45 minutes to find someone to snack on (or five people safely), you consider maybe having some more.
Oh, hey, it sure looks like there's commotion in the bathroom.
Now what?
***
Healthy: 98/100 HP, 5/15 MP
Hungry: 4.3/10 liters, estimated blood at sleep is 3.1 liters
Timing: Dawn in 3 hours, 45 minutes, estimated time before frenzy upon waking is 48 minutes
(You've got a servant, so the 1 pint her hour is now reduced to 1 liter for every 3 hours. Daytime energy consumption is lessened to one liter for every 5 hours as opposed to 4. Find a human servant and it becomes 1 liter / 4 hours awake and 1 liter / 6 hours asleep.)