Negative group emotions are harmful and unsettling: you can tangibly feel the anxiety, stress and bad feeling.
Such negative group situations are best avoided.
Seek out groups with positive emotions instead...
If the supermarket at 4 PM on a Saturday afternoon feels particularly tiring and stressful, why not try going shopping at odd hours?
6 AM is a whole other story; there are too few people to generate group emotion, the aisles are virtually empty and you feel no pressure whatsoever.