The Wayback Machine - https://web.archive.org/all/20060507122230/http://www.madrid-hotels.ws:80/en/info/special_note.html
PLEASE READ CAREFULLY!
Groups over 6 people in one apartment will be required to pay a 50 euro per person deposit which will not be refunded if there are complaints from neighbours or police about bad behaviour, noise or littering in the building.
