I never give in to group pressure. I never did so ever since I was a child. It was always a pleasure to watch the facial expressions of people frustrated by my obstinacy. In a sense it was one of my ways of telling others that no one can tell me what to do. Indeed, to this very day, I say no, more than I say yes.
I learned, much later that the person who does not give in to group pressure is an individualist, and that, ironically, individualists become the unique models that groups pattern their values, thinking, and behavior after.