Currently in Egypt and they just asked us to pay in USD cash for an added activity but, not being American, we don’t have USD. We have the local currency and the ability to get that out at ATMs, but no way to access foreign currency. So annoying but they accepted local in the end.
As an American, asking me to pay in USD in a foreign country is annoying too. I don’t carry a bunch of cash when I travel and the cash I do carry is in the country I’m in’s currency.
Edit: Also I’ve noticed that most things priced in USD are more expensive than those prices in the local currency