How can I convince my parents to let me out on New Years?

Just, be upfront and ask them. Trust me, if you time it right, you can get anything. Ask in a very calm time and just walk up to them, sit down and tell them what you want. If they think there will be beer there, ure them that if your drunk or had a beer you will go with your parents to the cop station and take the breath test. A little tip: Ask questions. That'll win you any argument. If they say no, ask why. Just ask ask ask ask and ask. they will give in eventually.