I've eaten at the Blindekuh in Zurich! It was really neat. We had the added complication of a language barrier in addition to the utter darkness, but we muddled with Italian to Spanish, and had a great time. Food was good, but the overwhelming sense I recollect was completely disoriented kinesthetics: that the table was angled, or suddenly triangular instead of square, that my utensils and glassware were nearer or futher than I remembered placing them, that the people at the table next to me were within a half armlength of me (they weren't, though they were closer than is habitual in American restaurants, I think, and they were LOUD), and a constant feeling that space was elastic, malleable because I couldn't correlate the spatials visually.
Also, really liked this story. Thanks, PC.