A Circle is only as useful as the people in it. A big one is not the goal. A trusted one is.
What a Circle is for
A Circle is the group of friends you share recommendations with. Its job is to give you picks you can rely on, from people whose taste you understand, rather than a stream of opinions from strangers.
That job shapes how you should build it. A Circle is not a following. It is not a way to be seen. It is a small, private set of people you would be glad to hear from when you are choosing where to eat on a Friday night.
Start with people whose taste you already know
Think of the friends whose recommendations you have followed before and enjoyed. A handful of them is a good beginning. You already know how their picks tend to turn out, which is the most valuable thing a Circle can offer.
If you are not sure who belongs, try this: think of the last five places you tried on a friend's advice, and who sent you. The ones who were right more often than not are your starting point.
Include different tastes on purpose
If everyone loves the same kind of place, your picks will all look alike. A friend who prefers quiet cafes and another who loves late dinners will give you more to choose from. So will someone who cooks a lot, someone who travels, and someone who knows every barber in the neighbourhood.
A varied Circle also helps you in different moods. The friend you ask for a first date is not always the friend you ask for a family dinner.
Invite people because you trust their judgement
Invite people because you trust their judgement, not because the numbers look better. A Circle padded with acquaintances dilutes the Vouches that matter. If you would not take a recommendation from someone, they do not need to be in your Circle.
The same goes for how you behave in other people's Circles. Be the kind of member whose recommendations are worth hearing: specific, honest and not too frequent.
The trade-off, stated plainly
There is a trade-off, and it is worth being honest about it. A small Circle means fewer picks, especially at the start. There will be weeks when nothing new comes through, and neighbourhoods where nobody in your Circle has been.
That is the price of Vouches you actually believe. A Circle can grow as you meet more people whose advice you value, and there is no rush. A slow Circle that you trust is better than a quick one you ignore.
Look after it
Check in with it now and then. If a friend's picks never suit you, you do not need to give up on them. You simply know to weigh their advice differently. Friendships are not recommendation engines, and a friend whose taste differs from yours may still be a wonderful person to share a meal with.
It also helps to give back. If a friend recommends something that you loved, tell them. A short message saying "that was perfect, thank you" keeps the habit going and makes the next recommendation more likely.
A Circle is private by design
On frndly, a Circle is private to the people in it. That is deliberate. Recommendations between friends work because they are not performances. Nobody is competing for attention, and nobody is trying to build an audience.
If you are starting from scratch, begin with two or three people. See how it feels. Add someone when you find yourself thinking, "I would really like to know what they think of this place."