We never had these sort of problems with our DS, and I guess it's worse when the child is a girl. How old are her siblings, and what sort of things did they get up to at a similar age?
My wife was a Nursery Supervisor, then teacher, and I was a parent-helper at school, then a Teaching Assistant for 12 years, so we knew enough to always stay in control. Not that we needed to really, as he didn't misbehave.
But it must be difficult having several children, and I don't know how I would have coped with more than one!
What has your relationship with her been like when she was younger? How is her behaviour at school, and what is her school work and effort like?
I worked as TA in a tough comprehensive for two years, and many of the children were out of control, due to deprived home life or poor parenting. (If you saw "Educating Yorkshire", it was like that only our management and most teachers were nothing like as good as the ones on TV!)
But, normally children don't WANT to be evil, or unpopular with adults or their peers, but I suppose the instinct to 'be grown up' overrides their previous good behaviour and common sense.
The parent, or teacher at school, has to set rules and boundaries, but they need to be REASONABLE and not PETTY, or unnecessary, as that's probably when the trouble starts.
Thirteen seems very young to be drinking outside, so why does she feel she needs to do it? Are you able to discuss it with her, or does it just turn into a shouting match?
Does she have other interests or hobbies, out of school? I worked in a voluntary 'social work' type of support group in a primary school, where children who might get into trouble or fights at lunch time, could come in and do activities, or just talk about their feelings, and off-load their stress a bit. One Yr6 girl was often in trouble at school, but I was amazed to learn she did St John's Ambulance work, and she became a different person talking about that.
Try giving her some 'homework' from me: Can she write down WHY she behaves like this, and why she needs to drink? (Not an essay, just a few bullet points on the 'pros and cons' of her life and behaviour.) It might make her think about things a bit, even if the doesn't actually write anything down!
Hope things improve for you all.