Riding with others is very much a Trust-Fall exercise. If anyone doesn't gellgel with your group, it can cause dynamics issues with the dynamic and that can grow into full-on accidents.
Sometimes itsit's best to set some ground rules or expectations before departing. For example most of our group rides arefollow these rules:
- route is described generally to everyone
- group stays together, we stop for red lights and flats
- climbs are at your own pace
- regroup at the top (or nominated spot like "the fountain" )
- descents are never a race and often result in spreading out. We'd rarely end up with a paceline heading down a descent, though undulating terrain would be normal
- again, regroup at the bottom, or push on and maintain momentum till some convenient stop/cafe etc.