Don't get the chance to ride in a group very often. But, I can tell you from an outsider's perspective groups can be dangerous. Dangerous to those around them. They often seem to lose perspective and start behaving like they were on a professional tour race and have priority over everyone and everything else. Probably the worse I've seen is a group at speed charging through a city park sending everyone ducking to avoid being run over. Lots of scared kids and parents on that one.

On the other hand some of my most enjoyable riding has been with two or three other people enjoying the day and each other. Lots of smiles.