In LA, every small locally owned coffee shop has become totally overrun with folks buying one latte and proceeding to take a whole table to themselves and their laptops for the next 5 hours.
That's what a third place is and what people are lamenting the lack of now.
In Italy they charge you for the seat.
I have been to places where they charge for a laptop too.
In addition you can minimize cellular network reception and charge for wifi.
https://www.cnn.com/2014/10/03/travel/marriott-fcc-wi-fi-fin...
I could not find an English shop that sells it with nice pattern, but you can always use something like this :
https://consciousspaces.com/products/yshield-hnv100-emf-shie...