Related:

• Algebraists do it in groups.
• Cluster analysts do it in groups.
• Mathematicians do it in groups.
• Social groups are generally in disarray. To protect themselves from other group
  especially the groups just below them, groups will attempt to convey an appearance of interior order and purpose they do not possess....
• Truly innovative ideas do not arise from groups of people, but from individuals.
  When groups try to be creative, the members force each other to compromise and, as a result, creative ideas tend to be weakened and made more conventional....
• Design flaws travel in groups.
• Pizza IS the four food groups!