Exactly, designing a 'third place' that isn't alcohol focused seems to be a tough nut to crack. Alcohol greases the wheels for socialization and is a highly profitable item for a place to sell that keeps the lights on (people may have several drinks an hour, drinking leads to more drinking both in the long and shot terms, etc). Meanwhile a typical coffeeshop here in seattle is, aside from the espresso machines, is a near silent library-like space. Many people heads down in a book or a laptop. Instead of having a few drinks per hour you instead may have a single coffee and maybe a pastry or sandwich.

If someone opened a social space with maybe a kitchen that let you pay by the hour to hang out, credit for kitchen orders. All the other bar/pub accoutrements gaming (darts, pool, shuffleboard, pinball, whatnot), sports on the tv, whatever .. I still don't think people will go for it.

I think the only non-boozy option that comes to mind is the small town diner but those are thin on the ground.