I used to ride too, and took the MSF class where they teach you to ride in a staggered formation.  It concerns me when I see groups of bikers riding in a side by side instead of staggered, formation, with the left side bikes riding right next to the center line of the road and so close to oncoming vehicles.  This is especially eye opening to me along the winding highway between Hanauma Bay and Sandy Beach.  I've seen so many close encounters with bikers next to the center line and buses or trucks heading in the opposite direction.  It's surprising to me that there haven't been even more collisions in that area.