Calculation:
6 nights, every single night will cost 50 euro = 300 euro
2? afterparty's will cost you about 30 euro = 60 euro
drinks, say 4 per party (no mix) 6 euro each= 192 euro
food, one meal a day, 7 days, 15 euro each= 105 euro
food, breakfast 7 days, 5 euro a day= 35 euro
Don't spent it on souvenirs and other stuff, you will have to bring 692 euro for the items above....