[arevno]

> or have too large denominations that people refuse

In the US, if you have actually incurred a debt (e.g. you've already eaten your meal, or you've already had the repair performed, etc), the business can "refuse" payment in cash, but by so doing, they have effectively declared the debt void.

US legal tender case law permits businesses to refuse cash for non-debt-mediated transactions, but if a debt has been incurred, they have to accept it.