American nightclub

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?




Similar Riddles

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

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I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

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Pronounced as one letter,
And written with three,
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And two only in me.
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Jenifer: I am definitely not over 30.
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In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

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If a boy blows 18 bubbles,
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A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

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All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

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It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
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There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.