Look in front of you
In a group, you sometimes do things better when you are not too social :-).
Most people look at each other as they talk. In our culture, we are accustomed to that and for many that is the proper way. However, in some situations it is not practical or sensible. For example, in the car. There, the driver should keep his eyes on the road, and not to look at his passenger. In a group ride, cyclists tend to talk a lot, and many look at each other.
Talking to your neighbor and still looking at the road is easier said than done. You will have to practice. And coach each other. Especially those who ride behind a pair that look at each other constantly: you kindly interfere. Tell them they need to look forward.