I'm going to drive impaired
Why would you drive impaired? That is very dangerous?
We are going to be playing drinking games and I am bad at them, so I know I'll have to drink.
Driving under the influence could harm not only yourself, but many others too. It is against the law and should not be done.
People do it all of the time, I will be fine.
It does not matter if others do it, you should not do it. It is illegal for a reason, and many people die by it all the time.