Originally Posted by SilentKnight

Tequila prices at the San Diego bar and restaurant can change every five minutes based on demand. If more people order one tequila brand, the price of another might drop. Software, created by Los Angeles-based The Drink Exchange, tracks what drinkers buy and flashes the changing prices of more than two dozen tequila brands on TV screens hung on the bar's walls. On a recent night, a shot of Espolon Blanco tequila was $7.75 one minute and fell 50 cents to $7.25 a few minutes later. At the same time, another brand rose a dollar to $12 a shot.