To be fair, a proper 3rd place really can't be a company proper, since there's always the pressure of 'buy or leave'.
Even malls aren't sufficient, since many of them are incredibly hostile to under-18. I instead look at public libraries as the gold standard here.
It makes much more sense for cities to run the actual 3rd place, and businesses rent around the 3rd place. That way, coffee shops, restaurants, and the like can comingle as can the people.
Outside the USA, we see more of that in various areas. But folks here would likely howl socialism with a 3rd place run by the city. One can wish for better community, but alas.