New friends after thirty
After university, most city people's circle of friends stops growing. Work gives colleagues, family gives relatives, and the apps give people you talk to and never meet. Meeting someone new who becomes a real friend gets harder every year, not for want of wanting to, but for want of somewhere to start.
Tennis is an interesting exception, because the structure of the sport forces a conversation to happen, without anyone having to be the one who starts it.
A sport that always needs another person
You can run alone, go to the gym alone, swim alone. You cannot play tennis alone. Every time you step on court there has to be at least one other person, and that person has to be willing to spend at least an hour with you. So the sport is the best excuse there is for meeting someone you do not know well yet.
On court the conversation starts itself, without effort: calling the score, a sorry for the net cord, a word for a good shot, a complaint about the sun. Those small sentences add up to familiarity within a set, and nobody has to tell their life story.
A language that needs no translating
Tennis carries one set of manners that is the same the world over: wait for the point to end before walking behind a court, call your own side honestly, shake hands at the net when it is over. People who know these manners understand each other from the first ball, whatever language they speak and whatever world they come from.
That is why people who move city, or move country, so often find their first friends on a tennis court. No introduction needed, no one to know beforehand, just a level close to yours and a free hour that matches.
Level is what makes people equal
On court, job titles and ages disappear. The only thing that means anything is how you play. A senior executive and someone in their first job can hit as equals if their levels are close, and that temporary equality is what makes the conversation after the game more natural than at any reception.
Long-time players say the same thing: a great many close friendships of their working years began with a hitting partner at the right level, not with having anything in common beforehand.
What the research can and cannot say
There is a great deal of research on social ties and health. The club's own article, The half that is not exercise, summarises a review of 148 studies covering 308,849 people, which found that people with stronger social relationships were about 50% more likely to be alive at follow-up; and the authors of the Copenhagen study noticed that the sports at the top of their longevity table were all sports that need a partner or an opponent.
The limit has to be said every time. These are observational studies: they show an association, and do not prove that the sport causes the outcome. What they can say is that people who have someone to hit with regularly tend to have a different social life from people who exercise alone, and that the difference seems to mean something.
The court a city needs
The court that can serve as a social language is not the best court. It is the one where people of a similar level meet regularly, where someone without a partner can find one, and where there is time after the game to sit and talk. Those three things matter more than the surface and the lights.
City people are not short of courts. They are short of places where they know who they will meet. A session that groups people by level, and names the people you will meet before you go, turns going to play tennis from an appointment into going to see friends.
Start with the first session
THE SET. runs sessions that gather people by the level they rated themselves at, with Match Me for anyone who wants to play doubles but has no partner yet. Sign up, and the first session may be where you meet the people you will hit with for years.
General guidance, not a research finding.