I'm back to ask some more!

Um... okay, here goes.
I shot her a specialty Withering, but she didn't seem to notice.
What is a specialty Withering? Does it mean like I gave her a look?
Also..
I briefly wondered if it was as obvious to Christian as it was to me that I was being whored out.
Does being whored out mean being left out or what?
One last question!
Even though it was a random Thursday night, the velvet rope police were out in full force.
I am assuming that the velvet rope police are those people in front of bars receiving admission and checking the age of those entering. Am I right?
Please take a few minutes and answer my questions if you know what these mean. Thank you!!