How to get my parents to let me go to a sick party?

As much as it sucks, there's no way to make them let anda go to the party. It's probably for the best. Even if anda say anda won't drink, bad things can still happen. A friend of someone I know did that, and someone slipped something in her drink; and she got raped and she ended up in the hospital for it. It's best anda don't go to a party like that.

I know the party has most likely been and gone oleh this time, but I have some ideas for future reference.
Tell your parents that anda think they have raised anda to be responsible and mature enough to go out with your friends and not get into any trouble. It's a bit of a mean trick, but either they let anda go, atau they are forced into admitting they didn't raise anda well enough. When you're asking them, make sure anda demonstrate this maturity, and talk to them in a level tone, and don't throw a tantrum if they say no atau get angry. Let them know you're upset that anda will be missing out, and ask them to reconsider.
It's also important that anda take into consideration what was berkata in the answer above mine. anda berkata you're not going to drink, but if anda go to parties like this, make sure anda keep yourself and your friends safe. It's great that anda told your parents that there will be alcohol, because if anda get in any sort of trouble, they should be the first people anda call for help (or if it's serious trouble, emergency numbers).