What Can We All Learn About Networking from Marty?

I attended an indoor cycle class at my gym today. As I entered the room, a gentleman in his sixties smiled like he knew me and hollered a robust "hello!". I chose a bike near him because he was so friendly. He asked me if I was a biker and we discussed the types of workouts we do, in and out of the gym. The man introduced himself as Marty. As another participant entered the class, Marty asked her if she needed any help getting her bike set up. I’d be willing to bet Marty has never had a hard time building his network, expanding his business opportunities, or finding a job.