Xenia 2019 Greece Hospitality Conundrum: Is Airbnb the Real Enemy of Hoteliers? 6 years ago Alexandros Vassilikos, who's President of the Hellenic Chamber of Hotels, is calling a solid framework to regulate the activities of… Xenia 2019 Expo Comes to Athens November 23-25 6 years ago November 23rd through November 25th, the Xenia 2019 exhibition welcomes professionals from the hotel and wider hospitality industry.