Where? I've been most places and never encountered this. It should be noted that in the US "half and half" is popular which isn't a thing in Europe but would be referred to as "cream" by Americans.
We make the distinction between half and half and cream. If I goto a diner there's usually both light cream and half&half available for coffee in plastic mini-creamers.
Austrians do it ("einspänner" and "melange") - Germans and French will have that (called "wiener" style or "vienois"). Italians have their "Espresso con panna" (literally: "Espresso with cream") - would also use. The Swiss will often take their coffee with cream too. In Czech republic it's "kafe se šlehačkou", in Greece it's common in capuccinos or added at will to black coffee.
Whipped creme is perhaps the most common form (cream + sugar whipped).
Not sure about "half and half" though, think that's just an American thing / product.