This is actually a tangible problem needs tangible answers.
I have come across the problem too, so my search provides these options.
This is a site that would gather similar interest/hobby people together, so that they can form a circle or become friends.
2. Invest into your zones/fields/areas
This one looks kind of OK? But I am not sure the tangibility of it, meaning, whether it’s going to work. You do can invest yourself into your own fields, but the possibility of getting similar persons come close? Hard chance I’d say.
If there is any other, please comment below I would update immediately.