Hi,
I just called to Egnatia Aviation to ask about their situation. They said that they don't have any assets in Greece nor any transactions with the local banks. They, or he said me that if Greece will fall out from euro they will keep everything same as usually. The school will only use euros and the tuition will remain same.
Also he advertised how great everything is and they are expanding the school all the time. Well, you can't say if you haven't seen it yourself, I'm going there on July so I can give some feedback then