I do this every stay. I've had wild success with one, fair results with others, and some that just aren't interested. A lot of front desk don't know the ins and outs of the online contracts or their hotel's overall profitability isn't really on their minds - and who can blame them - they're not paid to run the place, just to check people in and out and listen to the dozens of requests and complaints that come day in and day out (which I assure you is an underpaid job here and there.) But if you can get to a manager, they're the ones that will usually be more than happy to help because they know it's in their best interest. Better trained front desk know this, too, but don't always have the authority to make the call. All depends on how much their manager has empowered them. I've found that if they say they can't, a polite request for them to run it by their manager whenever is convenient to them and get back to me does the trick.