Yes, some guests opt to recycle bottles, or ask housekeeping not to replace bed linens or bathroom towels each morning, if given the choice.

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For that we must turn to the notorious saga of the bad, bad girl who told me in hushed tones that, while she was staying in a room with two beds at the Setai in Miami, she proceeded to carefully remove the Christian Fischbacher satin sheets from the unused bed, then meticulously remake it so as not to alert housekeeping.

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Researchers say walking, climbing steps, biking and even dancing all count, but activities such as bowling and light housekeeping do not.

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One characteristic of many housekeeping genes is that not everyone has the same version.

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That option means you do not have to hire staff or housekeeping or worry if your pipes burst during a cold spell.

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