Whould you let your teenager drink?

Alecia's friend's 15th bday party was last night and she was going to stay the night (It wasn't a sleep over, but Alecia was aked if she would like to stay the night).
The friend's mother came to get them (the friend was here borrowing some clothes) and asked tells me she was planning on getting the friend some cans of drink for after the party and asked if Alecia was allowed. I flat out said 'no, Alecia is not allowed to drink'.

I don't think I will ever allow Alecia to drink until she is 18, even then I will be warning her against it... what are your views?

Tanya