Perhaps I missed something? I was in Macao less than two months ago and the Venetian still seemed to have plenty hanging out there.
Couple of tips (bros, jump in if I say something wrong here):
1) You'll need to be there late in the day. Most WG's don't creep into the V casino floor until after 10pm or so.
2) Look for them at the slot machines around the Bellini Lounge, or inside the Bellini Lounge itself. They are fairly easy to spot, if you make eye contact and they start to make eyes at you - decide whether or not you like them and move fast to talk. If any of the security guards think that she's bothering you, they will move quickly to kick her out or arrest her.
My first encounter with a WG was there. "So, the odds are that if you see a pretty girl lock eyes with you from a slot machine, she's available."
Good luck and Happy Hunting!
-SB
[edited to correct typo]