As for this person's demands: if (s)he doesn't have 300 friends to show up, then Hilton will just overbook the hotel by a couple of hundred rooms and be done with it. If (s)he brings 10 people, they walk those 10 people to a "similar" property with empty rooms - some other hotel would help out. And if it had been a US property with a state-imposed $1/night occupancy tax and a $2/night energy surcharge, they'd have charged him $900 for the no-shows to boot.