This is one of the reasons I signed up for a coworking space - it is so distracting having to mentally keep track of whether I’m spending the minimum amount. If I have a proper meal at the coffeeshop it easily costs more than one coffee an hour. But then after an hour nobody remembers I bought the big meal so I feel compelled to buy another drink (that I don’t want).
Then there’s a shift change and again I feel I need to prove I’m not a freeloader.