https://www.wired.com/2010/09/ugly-vegas-carpets/
https://lasvegassun.com/news/2010/jan/11/hes-behind-casinos-scent-science/
https://www.gamblingsitesonline.org/casino/articles/tricks-casinos-use/
https://www.livescience.com/36084-alcohol-releases-endorphins-brain.html
https://www.vegasmaster.com/casino-psychology-tricks-used-on-players/
https://www.businessinsider.com/casino-tricks-make-you-spend-money-2019-6#they-offer-loyalty-programs-9
https://listverse.com/2010/02/09/10-tricks-casinos-use-on-you/
https://www.ranker.com/list/ways-casinos-trick-you/jason-robbins
http://www.businesspundit.com/10-most-sinister-ways-casinos-keep-you-gambling/
https://www.theatlantic.com/magazine/archive/2016/12/losing-it-all/505814/