Hacker News Reader

In Germany, 41.8% of households have just one person.

In the USA, 28.4% of households have just one person.

I'd wager they count in different ways. Or I'm living in a total bubble. None of my friends is living alone. All of them are either sharing a house with others or living together with their girlfriend/wife.

Edit: it might be that your statistic is dominated by houses being owned by old people

Dominos in the UK has similar incentives but put in place less rigidly - any medium/large pizza will run you £18-£20, but there are loads of 40%-50% discount above £x (x >= 35) or 2-4-1 deals. This makes it more difficult to justify a solo order (unless you get 2 pizzas, which, fair enough) and incentivises ordering with friends or not at all.

Maybe it's just me, but I've never ordered a pizza alone, even when I did live alone. I only ordered pizza when friends or family came over.

If it's just me eating I'd go get a burger or some other single serving fast food.