When two people are out socially having fun, vibing occurs. A good PUA is able to step outside his head and enjoy the convo, bouncing back comments that indicate he is there enjoying himself and his company.
The ingredients to vibing are:
1. Push/pull. Send playful mixed signals, be hot and cold, keep her guessing about your intentions and meanings.
2. Exaggerated remarks such as ridiculous accusations, misinterpretation of comments you hear, making outlandish comparisons. Reframe so she appears to be chasing you, even with innocuous comments like asking where you live.
3. Let others impress. Don't frequently take people's comments and try to out-do them, impress them or add your own advice and perspectives.
4. Be playfully aloof. If she asks a question, don't always give a straight answer. If she challenges you on it, don't become defensive. Just have fun with her.
The caveat to the above is sometimes you need to turn off these tactics and just 'be yourself.' If a girl wants you to be serious, sometimes it's best to go that route. The bottom line is that by vibing well, you show you are non-needy, don't seek the approval of others, aren't overly analytical, are sure in who you are, have a strong frame that isn't easily shaken, and are just a fun guy to hang out with.