Is it? There are a number of third places around here that sit effectively vacant. The few who are passionate about seeing those spaces thrive will tell you that the problem is getting anyone to come, not finding space to host them.
I live in a major metro renowned for its green space, but we absolutely still have a space issue.
* Outdoor spaces close at dusk for the most part, restricting sociability in the winter months when it’s darker, sooner, and longer.
* Winters are cold, making outdoor spaces less usable during those months
* Indoor spaces are exclusively fee-oriented. Coffee shops evict customers after an hour or so, movie theaters can run upwards of $30 a person for a ticket and a snack, malls eject loiterers, gallerias harass anyone clearly not there to do business.
* The few places NOT fee-oriented - like public libraries - are either saturated with use and lack capacity for more folks, or are under-used due to requiring a car to access them.
* Youth in particular lack third-spaces to explore within, fee or no-fee. One roller rink serves the entire north portion of the city and isn’t accessible except by car. Ice rinks are co-opted by hockey teams year-round. Bowling alleys can run $15/person/game, at times, and dwindle in number. Schools are closed except to those involved in extracurriculars after-hours. Arcades are non-existent, the sole skate park closes at dusk, and cops or security harass any group of teenagers they find, especially in parks or public spaces. It’s bad enough as an adult with a car, it’s downright hostile to anyone young or unable to drive.
* The few genuine community centers that do exist, generally operate solely in rich towns that restrict access to citizens, or in impoverished areas and tied to specific special interest agendas for access - many of which may be good, but many more attempt to convert visitors to religions or political groups.
* Even if someone has space in their apartment to host, landlords have gotten so sleazy that parking for visitors is either non-existent or costs money to utilize, thus reducing the ability to host at all without spending more money.
But you’re right, it’s not necessarily a space issue.
It’s a money issue, in that we’ve built a society where you’re barred from enjoyment, self-discovery, or group fulfillment unless you’re spending $20 an hour or white and old enough to be invisible to cops and Karens.
It is not. While said third places obviously do need resources to operate, that has already been figured out by those passionate to make a go of having the third place. Generous donations, grants, and fundraising go a long way.
I do buy that it is somewhat of a marketing problem. I expect a lot of people don't even know they exist. I was once talking to someone who literally lives just three doors down from one of those third places and it never occurred to him that he could even go in. But he also hasn't even now that he knows he can. That's quite telling.
I can also agree that there is a bit of a bootstrapping problem. If you show up and there is only a couple of other people there, you're not likely to return. If it was full of people, that'd be more compelling.
But these third places did thrive once upon a time. The bootstrapping problem was solved. The marketing problem was solved. It all fell apart because people found other things to do. The reality is that the population at large does not see a need for third places (of the type you speak) anymore. Houses nowadays are way bigger and more comfortable than they used to be so there isn't as much feeling of pressure to get out, there are more activities going on to occupy one's time[1], of course technology has become a significant distraction, etc.
[1] For example, my grandparents' generation would have never heard of putting their children in sports. My parents' generation would take their kids to a sport about once a week. Nowadays parents are carting their kids off to sporting events every single night of the week! That doesn't leave time to occupy a third place[2].
[2] The sporting event venue is technically a third place[3], granted, but if you've been to one you'll know they aren't particularly social for the parents. They mostly just sit there watching their children (or phone, quite often), not to mention that the considerable time spent in the car travelling from far off place to far off place to get to the competition is not social at all. I don't think that is what you have in mind with respect to the greater conversation.
[3] Open to the public, free of charge. If I am wrong above and this is what you did have in mind, then it serves as another example of the space being there with no need for you to open your wallet. All you have to do is show up. But will you? I already know the answer is "No." The actual parents don't even look like they want to be there most of the time.
Is it? There are a number of third places around here that sit effectively vacant. The few who are passionate about seeing those spaces thrive will tell you that the problem is getting anyone to come, not finding space to host them.