You will need to arrange your own accommodation keeping in mind that it is Mardi Gras, which also coincides with the start of the University of Sydney semester.
Athens Facilities. The AAIA in Athens provides accommodation in a dedicated hostel, as well as administrative support for our Greek-based activities through our Athens office. ... For any hostel accommodation queries, please email aaia@otenet.gr.
From our premises in Athens (AAIA-A), we offer accommodation, research and teaching space, and our Athens-based administrative team facilitates access to Greek sites and museums for our research community