I learned (the hard way), that hotels have "ghetto rooms," that they can't book out to other guests (think next to the elevators or vending, or with dysfunctional amenities).

If you book with one of the booking agencies (I will not name the two that I used), the hotel will often give you one of these rooms, off the bat. You can complain, and they'll get you another one, but that is not something that you want to do, when you just checked in at 11PM, and your first meeting is at 8AM, the next morning.

BTW: Hotels are not supposed to do that, but they do, anyway. It's hard to prove.