I knew Google and Virgin allows employees to nap during the work time, if preferred. They have "Sleeping Pods". Here are few:<p><a href="http://www.inc.com/zoe-henry/google-uber-and-other-companies-where-you-can-nap-at-the-office.html" rel="nofollow">http://www.inc.com/zoe-henry/google-uber-and-other-companies...</a><p><a href="https://www.virgin.com/entrepreneur/are-sleeping-pods-about-become-commonplace-offices" rel="nofollow">https://www.virgin.com/entrepreneur/are-sleeping-pods-about-...</a>