I live in Australia. We are widely known for our quality and variety of both coffee and beer, and I can tell you I’m in the same boat as the other guy. It doesn’t matter what flavours you try to use to mask it, the bad taste of the beer or coffee still comes through. I imagine it’s like those people that say cilantro tastes like soap, and even a small amount in a dish makes the entire thing taste like soap, even if they didn’t know it was in there.