I believe it's 18 as in the UK although some areas of Spain it's 16 so I may be wrong. However the popular notion is that it's not strictly enforced apparently.
I think Donna was just having you on with a pop at all the reborn teenagers you get out there.
when i was there they didnt really give a toss loads of people on the street try and get you to go in their pubs/clubs working on comission be warned its madness (las americas) or whatever its called i went to