The thing about "lack of third spaces in the U.S." that doesn't get mentioned enough is that it's not just "Capitalists and corporations bought up the commons, privatized public resources, and made people pay to access them."
That's a big part of it. But it's not the only part.
The other part is that middle-class people -- particularly middle-class white, abled people -- willingly forked over money to set up private spaces rather than share public spaces with people of color, disabled people, neurodivergent people, poor people, religious minorities, and other "undesirable" people.
When you look at any article or picture from some point in the 20th century about third spaces that are less common now, consider that depending on exactly where and when in the 20th century U.S. this was, people of color might have been banned from that space by either law or threat of violence or both (or, at minimum, made to feel unwelcome). Physically disabled people probably could not access those spaces (or were institutionalized or kept at home). Visibly non-passing neurodivergent people probably could not access those spaces, because they were institutionalized or kept at home. Two women kissing, a man in a dress, any type of visibly queer or gender nonconforming person would not have been tolerated in that space.
And my point is, these things are not unrelated. The decline of third spaces is not unrelated to civil rights gains.
I'm not saying "Stop talking about the good things of the mid-20th century, don't you know that era also had racism and sexism and ableism and queerphobia?"
I'm saying they're not unrelated -- it's not "This time period was better in some ways, like more third spaces, but worse in some ways, like more racism and ableism." It's "Those good things, those third spaces, those labor unions, those safe neighborhoods, that sense of community, relied upon the systemic exclusion of a dehumanized underclass, and as soon as any civil rights pressure was put on that systemic exclusion, the sense of community crumbled."
The pattern is clear and recurring: Privileged people build a public space for "the community", marginalized people start using it (sometimes after a court case or two), the public place gets a reputation for being "full of" marginalized people, privileged people build a private space they can exclude people from, privileged people abandon the public space, the public space gets neglected and deprioritized because "nobody (who matters) uses it anymore," the public place goes to shit from neglect and possibly closes, the private space gets expensive, privileged people lament the loss of the public space.
Privileged people killed public pools rather than share them with Black people. Mortally wounded public schools rather than share them with people of color and religious minorities. Are trying to kill public libraries rather than share them with queer people and unhoused people and neurodivergent people. Can't revive public transportation for fear of sitting next to poor people. It's white flight all the way down.
The whole "Social democracy is the left wing of fascism" claim is tankie ridiculousness, but like most tankie ridiculousness, there's an underlying grain of truth. In this case, the underlying grain of truth is that widespread support for public services is a much easier sell when people don't think they'll have to share resources or public space with people they consider inferior. It's not a coincidence that some of the countries that provide the highest quality of life for their abled citizens are some of the worst to noncitizens and disabled people.
And it's not like Weird Queer Left-Leaning Types have a great track record of sharing public space with people different from yourselves, either. Y'all can't be normal about someone wearing a yarmulke at Pride. Y'all can't be normal about adults playing board games with kids. There's no way you'd be okay with unsupervised, uncontrolled, unmedicated-by-choice schizophrenic people hanging out and talking to themselves. You cannot handle public third spaces.
Yes, blame corporations and advertisers for privatizing public spaces, but also blame the social prejudice that willingly forks over money to avoid sharing public space with Those People.
