For me, it was at L'Ami Louis, in Paris, about fifteen years ago.
After a wonderful lunch, I could hear the chef grinding the beans. Then, a few moments later, I was brought a demi-tasse of the best few sips of coffee I have ever tasted.
It wasn't espresso, it was probably done in a French press. It was the only cup of coffee I have ever tasted that was as good as the aroma that preceded it.
I drank it in a trice and wanted more, but felt guilty about bothering him to make another. Now, I just feel guilty that I didn't.
At the time, there was an ongoing ad campaign for the coffees of Brazil, which I thought may have contributed to this extraordinary brew. I have since come to learn that it probably had little to do with country of origin and everything to do with the wizardry of a chef who was great at everything he did.
What's your best cup?