Opaque at the Hyatt
Your right it's more about the sensory experience than the food. You first order outside the restaurant, then your lead by a blind waiter by holding his/her shoulder to your table. It's completely dark and everyone is packed in the restaurant. You have to figure out how to eat without spilling or making a mess. It takes over an hour to finish.
I take my students every semester and everyone has a memorable time.
I think its worth doing at least once. The sensation of total and complete darkness is unforgettable. The food has been upgraded since their inception several years ago. I find the beef and salmon dishes to be the best. The $100 for the food alone is probably not a good value proposition, but for the entire experience, I'd say, try it once. The darkness does something interesting to the quality of conversation.
...and for couples, let's say there is a seriously under-rated erotic quality to the evening. After all, no one can see you!