Your ride is kind of like facebook. You have friends on your ride you would never have in real life. The man with the weird moustache who is the crossing guard at the local school gets a daily salutation. The lady sweeping the footpath in front of the medical apparatus shop gets a wave. All manner of human flotsam that bobs along the waves of traffic gets a polite nod or a hello.
BONUS TIP: Among the flotsam, some of these people are drowning. The 21st century is a shipwreck that has disgorged gasping hordes into the cold deep infinity of community-free modern life. Grab hold of a few before they sink beneath the surface.