Three years ago at the Reno Lifestyles convention we did a "dark room" in our suite for the first night of parties. Out of the 300 people that came to the party that night I would feel 100 of them went in the dark room. You could not see your hand in front of your face.
Some that went in came back out in a couple of minutes. Soime that went in did not come back out for hours!
The ones that like it had many positive comments to make about it. Some that did not even go in really ragged on me about even having something like that. Each to their own I guess.