I object on general principle to any shop that doesn't offer payment. Especially for fast casual food. It's the height of cheapness and arrogance to expect that we will work for food. I have eaten there for the first time recently, but now that I know they don't think they have to pay shoppers, never again. And fie on the MSC that got the contract and advised them that they could do this.
Or, in other words, you pay peanuts, you get monkeys.
Doing my best, every day