In Sigmod 2000 with Mario Nascimento, Yannis Theodoridis and Yannis Manolopoulos.
In Spiros Skiadopoulos' PhD, 18/2/2002. Panos Xeros, Theodore Dalamagas and me [It was more interesting than what you would think by looking at the photo...]
In 1st Hellenic Data Management Symposium with Angela Dimitriou and Yannis Vassiliou. Glyfada, July 2002. [Yes, we had a great time and yes, there is a reason for calling it 'symposium'...]