You see that's the bit I don't like about club riders / sportives/ being passed by such groups - you don't get any of that on an Audax, and if you did I would probably break off the group / drop out of the back as there is no good going to come of such riding if I have nowhere to maneuver from a hazard or riders are not concentrating the slightest bit due to fatigue. I apply a similar rule as to who's wheel I'll follow.... (mostly based on proper mudguards with a long flap
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I've just noticed this thread is in the cycling clubs section of the forum - so I'll leave it there