If you go into a coffeeshop in a major city, there is a good chance that you will find it entirely colonized by patrons with laptops who use the shop as a “home office.”
Even if you wait for half an hour, you might never get a table. Woe!
Previously, this issue could be mitigated by either:
- Not providing WiFi, which is now obsolete due to phone tethering and/or built-in cell radios in laptops.
- Restricting access to wall outlets (which worked very well in the era of 3-hour laptop batteries). But improved battery technology has rendered this approach ineffective as well.
Fig 1: This laptop has unavoidably occupied an entire coffeeshop table.
It is difficult to politely kick out a customer.
So we turn to a technical solution to discourage long-term laptop use: harsh overhead lighting.
Specifically, we propose strategically arranged spotlights (Fig. 2) that will be generally acceptable but will cause unbearable screen glare when reflecting off a laptop screen.
Fig 2: The array of ceiling lights (blue) is calculated to cause maximum laptop glare at all screen angles.
Fig 3: At left, we can see the reflecting lights in the (turned off) laptop screen. At right, note how the glare makes the computer unusable (compare to the laptop screen in Fig. 1).
If you own a coffeeshop and hate your customers, you should give this plan a shot!
PROS: Increases patron turnover and discourages long-term occupancy of tables.
CONS: It is possible that the substantial fraction of a coffeeshop’s patrons only go there to use their laptops, so cutting off this revenue may deal a fatal blow to the shop’s profitability.