Drink coffee around the same time as you imbibe alcohol by all means, just don’t expect your taste buds to be able to provide your brain with an accurate picture of what the coffee actually tastes like. In our experience even a single 330ml bottle of beer significantly blunts the taste buds, preventing you from being able to tell exactly what the coffee tastes like. Often this will not be an issue, for example, where you are already familiar with what the coffee tastes like, and just want ‘a coffee’. However it is a complete barrier to accurately assessing a coffee that you are unfamiliar with.