They advertise on websites like Skyscanner and Expedia in a section dedicated to rooms, mentioning a special price of 20 euros. You then receive a confirmation e-mail that says get ready for your New Year's breakfast - you arrive at your hotel in very poor weather conditions, with limited transport from the airport, and are told that the website only advertised the price of the BREAKFAST. As a result, you are given the choice to pay extra 100 euros, or to be relocated to a nearby hotel, for an additional 60 euros, not including the taxi one has to pay to get there. Both very far from the centre of Athens. Having chosen the latter option, the room was nice but definitely NOT what I had asked for.