Everyone is nearly all the same then.
Most people don't do any because of the effects, quite a few people drink, and some do all 3.
I think that part of Parkour is keeping the body healthy and fit. People have a good point that in low quantities, the body can handle alcohol, as the liver does its' job.
It's good to hear what everyone does. I've always wondered if i was the only teen not to do anything.