No, to me that's totally fine! They know what their costs are and they charge you accordingly. What bothers me is "the price is $X, but if you don't pay $Y our

No, to me that's totally fine! They know what their costs are and they charge you accordingly. What bothers me is "the price is $X, but if you don't pay $Y our workers won't be able to make ends meet, please support them!" I don't know how much your workers need, that's your job when you set prices! (And if the price is too high, I won't eat there, no harm done.) I just wonder if they expect you to also add an additional tip, since 2.5% is so much lower than the standard percentage.