Jacob
What goes around comes around.
The point of my post was to pass on the advice that cycling in a bunch is actually better for cyclists and for vehicles too -it makes overtaking easier, even if that is counter intuitive!...... Clubs out for a ride are OK providing they recognise motorists need to pass - 40 bikes in a two abreast stream is not good behaviour.
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I doubt you'd ever see 40 @ 2 abreast* but even if you did this could be easier to overtake than 40 stretched out down the road in a single line.
Here it is again, click on the graphic:
* I guess you might see 40 together when a big group is just setting off but they tend to separate quite soon into smaller groups