I don't drink coffee 'out' very often, but generally... 'bad' is when they are cheap with their coffee and not only buy cheap coffee, but make it weak AND have bad water to make it with, so the mineral taste from the water is more obvious. THEY are used to it..I am not. There is one place I go to yearly where, for the last 3 years I have taken my own small coffee maker (drip) and my own coffee and enough water for 2 days. I quietly brew in my room and use my own mug.