One weekend about 15 years ago, Chicago neurologist Alan Hirsch pumped a pleasant smell into a section of the casino floor of the Las Vegas Hilton and compared the amount gambled there to an area scented differently and to an area with no particular smell.
He also compared bets placed with the weekend before and the weekend after.
Gamblers spent 45 percent more money in the area with a pleasant smell.
— From Casino tailors air to delight the nose at SignOnSanDiego.

