[[Moderators - I thought long and hard about where to post this (well, about 30 seconds), and I chose here over the Vegas forum because this area gets more traffic. My bad if my judgement is about as good as Chretien's

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I'm going to Mandalay Bay in the near future, and I've read in a few places that being discreet and slipping the check-in clerk a $20 often goes a long way into getting your requests met (high floor, strip view, room upgrade, etc). Has anyone had any luck with the "$20 bribe play"? Any comments about this working at the Mandalay Bay?
Thanks in advance.
O