An unusual brothel

"This is a meeting place for the things of the night and those who love them, or just want a kinky thrill." The woman tells you.

"What are you?" you ask, feeling scared and excited.

"I am the madam of this house, and the master of all who dwell in it." She smiles and flashes a hint of a fang.

"You are a guest here and as such, you can not be harmed or ****, however if you wish to enjoy our amenities you must pay with cash, blood, or ass. If you choose not to we will just clean you up, give you a room for the night, and get you home with no memory." She says this all very kindly and awaits your answer.