Silent Treatment
A casual head nod sans speaking is the perfect way to confuse your new friend with coolness. Have you met before? Are you uninterested in them? Are you too cool to know who they are? Are somehow all of these true?
You forget, these people get off on attention. So just sit back, and watch them work to win you over. Trust, in their own little way, they will.
[Photo via @derekblasberg]