disqualify or repport.

rapport - when things get emotional with somebody. any strong emotion is fundamentally rapport. the commonality in this is what can build potential connection. did you see anurag light up with mentioning of social daynamics, elvine want to stay as much as possible, although very shy otherwise, without rapport there is no intemacy. and deep connection.
rapport is how you build deep association, the deeper it is, quickly more familiar it will get. one common sense thing is in rapport emotional intensity has to match or surpass. you can not just say I do it, this is anti-repport. rapport with bounce is clearly the recipe of high comfort. the more shallow the conversation is, the lesser is the possibility of repport. this is the common scenario in group conversation.

disqualify - the initial conversation is basically a pointer to decide wether to move further or disqualify other person. when you start a fresh conversation. there is the only one thing to gauge for. the comfort level of other person. some people are very closed and some people are uninterested. the closedness is basically, nervousness or blank mind. freeze. flowing conversation for sometime can open this person. it is not smart to put pressure on a closed person. talk as much as possible until body language start to open up and than go deeper and see if there is something common, on the other hand an uninterested person has strong preconceived notion for the association in their mind. if person is confident and uninterested, it’s either because you did something that has negative connotation or your looks and body language is being associated with something negative. initial sampling can be changed. but direct contact is less effective as compare to indirect demonstration. if you have to choose between these 2. choose closed one first.