Do woman hold all the power when you go to a bar and try to talk to a girl?

[Cataphract]

Yes and no.
Look, the typical way these things go is that a man choses a direction he wants to take, a woman accepts or refuses. If she accepts, he still gets to lead, and she gets to set the pace. So in truth most women just react, they don't make decisions. Now they can, but they usually don't. In a sense that she's a decision maker at the very start, a woman holds all the power. But only for a brief period of time.

[Mystic_Nova]

Yes. If she isn't interested, he won't get anywhere else

If she is interested. Shed probs continue the conversation.