I had a fascinating dining experience the other day - if these folks ever pop up in your area, it's worth an evening of your time:
http://theblindcafe.com/
The environment created for the event had absolutely no light. Not just "dark". I mean dark as in deep in a cave dark, not a stray photon to be found. The night I went, there were 8 tables of 12 people, plus servers, plus a 4-piece band, and 2-3 supervisory types, to the environment was quite acoustically busy.
Imagine the challenge of sitting down in front of a full dinner setting, and not being able to see the plates, silverware, glasses, contents of the plates, and so on... "Pass the bread please" is a bit of a team effort.
It was a pleasant change from being in such environments wearing protective gear doing heavy work, and the food and conversation were better as well.
Very good learning experience if you are claustrophobic or whatnot, as I am :-)