The point is you are paying for one bed, one living area, one bathroom, whether you are a single traveller or as a couple. I’m in a hotel room at the moment with a bed and a sofa, can host 4 people or me, it’s the same size. At breakfast I usually sit on a table which can seat 4, but certainly one that can seat 2. I use almost all the resources a couple do, and spend less at the bar in the evening, so I’d expect to pay the same or even more.