I laughed out loud at the bartender story here:
http://www.tommyspaulding.com/ , and I am BUYING his book.
It's Not Just Who You Know: Transform Your Life (and Your Organization) by Turning Colleagues and Contacts into Lasting, Genuine Relationships

We never know when we meet someone how that pebble in the pond is going to ripple back to us. If it is an authentic 'join-up' of genuine connection, it may lead us into wonderful and rewarding experiences.