There was a report on this board (I couldn't find it using search) of someone who was incensed because the MO Munich closed their rooftop pool area to residents because of a function. The hotel made various attempts to compensate but he was not mollified. I tended to agree with him - in an instance like that where the only outdoor venue of a city hotel gets closed off and you had planned to use it with your children, say, it would be very galling.