This Is a Pro-Level Moocher
Some food establishments, especially coffee shops and small cafes, have found that it can be a good business model to encourage people to bring in their laptops and work there. After all, for the price of electricity, you can have them sit there for a while and, hopefully, order a bunch of food and drinks.
Unfortunately, like most good things in life, someone will find a way to take advantage of it in the worst way. Ordering two cheap drinks in exchange for making the restaurant pay to charge every electronic device you own for three hours is not really what the restaurant had in mind, I’d imagine.