Got it (thanks Danny)
The venue is the "Iera Odos" which is on Iera Odos Avenue (18-20) , Athens
Link to map:
http://maps.google.co.uk/maps?hl=en-GB&rlz=1T4GGLJ_en-GBGB311GB311&um=1&ie=UTF-8&q=Iera+Odos+avenue+18-20+,+Athens&fb=1&gl=uk&hq=Iera+Odos+avenue+18-20+,&hnear=0x14a1bd1f067043f1:0x2736354576668ddd,Athens,+Greece&ei=8JYITq7SFYKwhAemtKDIDw&sa=X&oi=local_group&ct=image&ved=0CAQQtgM
Bit more relieved now