I'm going to a property investor's club meeting in a month or so. However, I'm only 18 (college student), and have no idea what to wear to these functions. Its a casual function, but still "formal" to me. Should I wear a shirt and black trousers, with or without a tie? Or don a suit and tie, going the whole way? Also, how should I act there? I've interacted with adults before, but always in an unequal standing (as student, work experience kid, or employee). I'm confident enough, but somewhat uncertain about the acceptable code of behaviour for these functions.