"According to a 2004 press release from Enhanced Air Technologies, a firm based in British Columbia, at least one major Las Vegas casino also pumps synthetic human pheromones into the air to increase business. The company claims its "Commercaire" pheromone instills a sense of comfort and security in humans, which makes them feel more at ease and increases the likelihood of repeat visits."
"In the face of a sluggish economy and decreased consumer spending, a growing number of retailers are beating the odds by infusing their establishments with a synthetic human pheromone designed to stimulate sales. Originally contracted to design a specialized pheromone compound for use by a major Las Vegas casino, Vancouver-based Enhanced Air Technologies (EAT) is pioneering the field. The firm has released its Commercaire pheromone, a powerful compound that causes consumers to feel a subconscious sense of comfort and security, which in turn causes them to stay longer and ultimately spend more."
...and I thought the liquor and the subdued lighting would be enough... ???