Earlier quoted context omitted.
As a cafe customer however it's irritating that you're taking up space for someone who'd like to sit down and drink their coffee. Or to put it another way: you're saving yourself money but (potentially) at the expense of the cafe owner who loses walk-in customers b/c his place is filled with barely-paying squatters.
Not entirely. The guys is a frequenter which means recurring revenue, and making the cafe look lively is something that gives it social proof. If the place has such a problem, they can mitigate it ofc. For example, you can limit the chargers for example (or arrange tables in a fashion that would limit it). Then the amount of squatters would be limited. Also, as another commenter said, you can just turn the wifi down…
Charging for the Wi-Fi would probably have a greater effect, plus additional revenue stream, but then would this negatively impact the experience of other more casually sitting customers.
I would be curious to see the coffee purchase numbers for a working squatter vs other customers. If someone sits in a coffee shop for 6 to 10 hours a day, I can't imagine them buying only one coffee. People can get thirsty throughout the day. And if they get hungry too, well, that's additional revenue if the working squatter doesn't want to lose their spot just because they went for lunch. Or maybe they're on a roll, and can't afford to risk breaking their zone by going to a restaurant.
To determine whether the working squatter has a higher or lower sales per hour number would probably also depend on the cafe's sitting customer turnover per hour.