Dinner in total darkness
The puzzle
A man is eating in a restaurant, and he cannot see a thing.
The power is on, and the restaurant is trading normally.
See the answer (spoiler)
Spoilers from here on. If you want to work it out yourself, leave this folded and move on.
Answer
It is a dine-in-the-dark restaurant.
The room is blacked out on purpose so that taste, smell and touch do all the work that sight usually does.