I was in Thessaloniki for two years while I was studying.
I think its the best place in Greece for youth people…
I mean the nights end in the morning
people are very friendly,most of them speek english..also the clubs and bars are great…very warm…After I finished my studies I went twice to visit my friends there…hope I`ll go again next month
also close to Thessaloniki are the Halkidiki beaches
ITS A GREAT TOWN

if you have a chance to visit it…just go and enjoy it