> 50$ bills are frowned on in retail Where would that be? On every trip to the US I have exchanged cash, EUR to USD, resulting in mostly $100 bills which I've

> 50$ bills are frowned on in retail Where would that be? On every trip to the US I have exchanged cash, EUR to USD, resulting in mostly $100 bills which I've used everywhere, sometimes even for rather small purchases, and there's been no frown upon that (after few purchases I also get my hands on smaller bills which are also more convenient).