Greece - May 1 to May 10

[futura]

I will be in Thessaloniki from May 1 to May 8 and Athens the 8th, 9th, 10th.

1. What are the best clubs + nights in both cities that are worth checking out?

2. Are there any "big" events going down... GPal... Digweed... etc...

I know the dates are a bit out, but wanted to research early.

Thanks.