http://www.theeroticreview.com/discussion_boards/viewmsg.asp?MessageID=113083&boardID=3&page=

you don't want the elevator security noticing your taking a girl to your room (they don't give a fuck anyway), but, just meet the girl somewhere in the casino or just anywhere a little ways from the elevators.  In LV they will ALWAYS give you two room keys.  Give her one and the two of you can pass by security as if you don't even know each other - just make sure you get it back from her so you have it for the next girl when you go meet her.

Now if you are meeting more than one girl, first you lucky bastard, second, then you just kind of have to tell the elevator security - yea they are all with me.............

Just stayed there last month. I have never seen anyone asking for room key to use the elevators. Admittedly, I may have missed it after too many drinks.

was just there 2 months ago and although they do stand there, never ask to see a key.