Originally Posted by Serapth
Beyond wearing a top-coat, hat and monocle, you cannot hurt yourself for over dressing.
You can however hurt yourself by under dressing.
This is very true. A suit and tie, or slacks with top coat is always best. One thing I can add is maybe not a black suit/white shirt. You don't want to look like an undertaker. A nice subtle gray or dark blue will do the trick. Also, if you do wear a tie, nothing to flashy that is distraction.