You run across an old friend.  Or perhaps make a new one.  They ask you about what work you’re doing now.  And you say, “XYZ.”
Your old/new friend goes on to describe their dilemma and the fact that they actually happen to have a great need for your “XYZ” service.  So the two of you decide to schedule a time to get together for coffee to talk about how you can collaborate.  You go home happy that you’re just a cup of joe away from sealing another deal and making a …