Road mannersA.
When riders are overtaking vehicles, once in front of the obstacle, widen the gap (i.e slow down a bit) to allow the next rider to pull in with a safe gap between him and the next vehicle.
A.
Don't ride close together, allow enough room for other road users to overtake safely if necessary.
G.
A ride day is not a race day - enjoy the ride with other members and save the racing for the track days.