A woman can be warm without inviting a stranger into her evening. The useful difference is the pause: she finishes speaking with her friend, stays near the counter, looks back after collecting her coat, then does not immediately disappear into the crowd.

That extra beat gives a man something better than a pickup line. He can comment on the wine she chose, the band nobody else seems to be listening to, or the chaos at the coat check. If she answers with more than politeness, the conversation has somewhere to go.

Friends spot it first. One woman gives her friend a side-eye, another suddenly remembers she needs the restroom, and the woman who was about to leave stays put. The evening has quietly changed before anyone says it out loud.

That is why the best move is usually small. Ask one question that belongs to the place, then let her decide whether the pause turns into a second sentence or a stretched goodbye.