Even better would be subgroups, like Tennis / mondaynight

Because when I try to remember the name of someone, its hard to scroll through the list of all people, but if I can narrow it down to a specific event or place (think, daughters school, work, sports club etc) its way easier!

People could be in multiple groups at the same time, I have someone at my tennis club that is actually one of the fathers at my daughters school .. so I might look it up from different places.