> The closest to a low-stress outing for parents is "I'm going to be at this playground in this park for an hour on Saturday morning, and whoever wants to join me is welcome to come."
That's perfect. I don't think the perspective is as different as maybe I made it seem. On Tinder I always met people for a drink someplace where I knew I liked the drinks, or that I was curious to try anyway. If the person was a dud or a no-show, at least I didn't invest much effort and got something out of it anyway.
Another way of putting it that might resonate better is that finding someone you click with is an intrinsically low-yield process. At first glance, it seems smarter to try to improve the yield (% of good matches) rather than volume (sheer number of people you meet), but services that try to do that don't accomplish much if anything. At best, they produce small increases in yield while increasing your time investment and/or emotional investment significantly. I don't know if that describes your situation, but if it does, it might turn out that the best strategy is to accept that the yield will be low and optimize to make high volume as painless (logistically and emotionally) as possible. The equivalent of Tinder would be an app that provides you with a steady stream of new people to invite to the park. If they're not your next BFF, or your kids don't get along, or even if they're bad people, bad parents? Well, that's the kind of person you have to be prepared to encounter when you go to the park anyway, so no biggie.