I would suggest Parga as a venue for your two! certainley not "Chavvy" nor is it full of English "Jack the lads" Very much a mixed age group, Three Night clubs (all sounproofed). Plenty of Taverna's. and Bars, Three good beaches, (one with pools attached)
The place by nature and design remains very GREEK and nothing built over three storey's high (The locals will not allow it to be anything else! Take a look at the Parga.com website and read the comments in the guest book to get a good idea and feel for the place.
Hope this helps

Sorry Kelvin

I know how much you love Parga after all these years and visits but I don't think Parga would be a good choice, it is a bit to laid back with very little night life other than a few fairly quiet bars, and the discos are very low key, so as a resort for lively night life, chav or not, Parga is not the resort to choose in this case.

Try Stalis Crete good nightlife but not over the top and you can always do Malia down the road for a wild night.
Rick.

Certain places on Corfu would be ok avoid Kavos 18/30 We love Kefalonia but they do not do nightclubs too often although night life can be very good in taverns, bars, etcpeople lovely. certain parts of Zakintos also, but as have travelled these Islands quite a few years ago things could have changed
pojo

tsilivi in zante would be a fair call, no clubs really but plenty of lively bars only problem not v greek

Yes Graham.................... you may be right and for theor age it may be a little quieter than what they are looking for, but it was just a suggestion