I assume these places will stop taking cards (or impose minimums or surcharges) as soon as the pandemic is sufficiently past, since merchant fees are a significant cost at their cheap prices and low margins. I would usually pay that kind of place in cash especially if I am not buying a large order, unless I don’t have the cash at the moment. But I usually carry cash just like before the pandemic. For things like Starbucks, of course they can eat the card fees no problem so I’d even buy a snack or a flavored water with a card from them.