I used to. I had the same friends since I was in the first grade...up until, about 2 or 3 years ago. There were four of us. One moved far away and kind of stopped coming to visit, the other is always busy at university, and the other is my best friend. So we're not so much of a gang anymore. The gang kind of grew in middle school but that all went to hell.
Pretty much everyone that I know, gave in to peer pressure (as in drugs, alcohol, etc. and I'm not talking about casual drinking) except for my best friend, sort of.