That's a broad question, since there are so many different approaches to the Game. And how effective a specific style is depends on your objective. Quick lay? Marriage? Orgy?
That said, knowing what you're doing is always better than no knowing what you're doing. If you go in cold with no plan, you will fall back on the same routine everyone does (interview questions, failing to escalate) and you will not stand out in any significant way.
Confidence is great. Looks certainly can help (but not essential). But what you sub-communicate is the key to the approach. In what ways was your confidence being communicated? How was your eye contact, body language, etc. How close were you standing. Who was doing all the talking. Were you showing interest or just being entertaining (the dancing monkey). There is a lot to learn, and all of it helps.
Read up and learn, and then apply what you learn. Good luck.
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