I see your point but I think you have it backward. Hotels would be justified in charging the extra fee at a much younger age. Some resorts charge at 12 or 16. As a courtesy, to help families, many hotels go up to 18.
Some hotels in large cities like NY have small rooms that are only large enough for double occupancy. If you have more than 2 you have to pay extra for a larger room.
Disney, and other hotels, are nice enough not to charge for extra guests all the way up to age 18 or 19 and that's not enough for some guests. Some guests, NOT IN THIS THREAD, don't seem to think there should be any occupancy limit.
Resort amenities like the pool are built for a certain occupancy level. It's certainly fair that the 3rd and 4th person in a room pay something. Certainly they extra guests are using extra towels, water and general wear and tear on the furnishings. When the hotel sets it's pricing structure and plans the size of the rooms it anticipates a certain revenue level from the extra adult charges.
You don't see couples complaining about paying twice per head as a family of 4 but you see the family of 4 complaining if they have to pay a few extra dollars if their oldest is college age.
Sorry I don't think it has as much to do with the hotels jacking up the price as guests who are looking for something for free.
TO ANSWER THE OP: There are so many alternatives, suite hotels, condo properties, 2 rooms in a less expensive hotel that I couldn't see squeezing more people in a hotel room than the occupancy.
GIOny said:
Like I said in the pp, I don't see how they justify charging more for a 18 or 19 year old, they are still children in a room with adults who are using the same towels and watching the same TV. Your right, Madi, about the water issue, it has nothing to do with it because I take a much faster shower then any of my kids. I didn't get what you meant by obese people, why should they pay anymore? Anyway IMHO it has nothing to do with right or wrong it has to do with the hotels jacking up the prices more.