You hit the nail on the head. Not all of the old guys in here are idiots, but they are still in the world of the 70s 80s and 90s , 2020s is a different ball game .I'll add a bit more to the negative side. I'm an "elder millennial," meaning I'm 41 years old. People my age grew up before the internet, when you came home when the street lights came on, etc. As a blanket statement, people my age or younger don't care much about socializing. If we do, there is online. If we want competition, we will play the newest and greatest online game. More competition there and you can play in your underwear. The world is shit, we've lived through countless recessions, terrorists, shootings, "pandemics" etc. The world is shit out there and nobody wants much of it. We've all worked retail as there aren't any real jobs left and it adds to the hatred of people. People are shit. A person can be great, but overall I'm not a fan of people or groups. It would be disrespectful and naive to call it retail PTSD, but trust me, you want nothing to do with the public.
I'm a bit different from the elder part. The American dream was sort of possible. I can't complain. Have a house and a pool table. Many 30 year olds are still living at home. No future. No jobs, no money, no affordable housing. It can be done, but good luck with the upbringing and brainwashing consumed on a daily basis.
We are entertained by a rectangle we carry around everywhere (I can hardly stand the things). Go out to a pool hall? Why? I can download 20 apps on my phone for free that I can play pool with real competitive players around the world. It's cheaper too.
I'm a little bit different due to having much older siblings and being brought up by parents with a parenting style a couple decades older than my contemporaries. The world out there (and mostly people) has become garbage through a constant bombardment of advertising, propaganda, a place where your thoughts are bought and sold by an algorithm. Instant gratification and a self centered society. "F" all of that, I'd rather set up a table in my basement and play with friends. Bars are where losers hang out (I don't believe this, but ask anyone under 40 once they are over 24 years old). If I want to drink, I can get a bottle for the cost of 4 shots at a cheap place. I have a big screen TV hooked to the internet and can watch anything I want on demand, even Dr. Dave videos while I'm at the table! I have video game systems from my childhood, arcade games, board games, cards, etc. Much to do there with friends, and if one of them is a smoker, I just open the basement window and turn on the fan.
So why go out at all? Boredom and seeking companionship or competition. You can meet friends, better folks playing pool than many places. At least more interesting.
But what's the market for a pool hall? Pool players are a niche market. Bars aren't for everybody. Everybody eats, but running a kitchen isn't an easy job if you want to do it right. Entertainment is cheap or free everywhere, what's the draw of a pool hall? Did kids play it in gym class and get a love for the game? Nope. Your best bet is someone had a table growing up or got interested in pool for some other reason, maybe seeing some highlight shots on a YouTube video. Pretty sketchy market future. I hope not, but the signs aren't great for a bright future. You have to make it a thing that people can get tik tok likes. Gotta have a backdrop for the instagram "models" to get the clicks. That's the younger (under 30) crowd. It's all about clout and bragging, even if it's not done for manipulative reasons. Those "upvotes" are a real serotonin booster. The system is rigged and designed that way. Young folks want glitz and glamor. They can't really ever have a piece of the "good life" (in quotes) so they want a place they can feel like a baller for a night.
If the local market supports it, I see a real path would be to have a billiards club, scanners at the door, cameras, open 24/7. Monthly or yearly fee. There, that's a place to play pool with nice tables. It's dicey but it could work in the right place. Membership only by being sponsored by a current member (who can lose membership if an issue arises) or by actually getting to know the applicant a bit.
You could have an open tournament for potential members or the public held a couple times a year if you need to drum up business. People want spaces with good equipment that aren't packed with other people.
Anything can or might work, in a given situation, but the standard for business success has changed.