Called the Brew exchange.
It is run like the stock market. They have a electronic ticker tape running around the bar with the beer prices on them. The more beer of one kind that is selling, the price goes up. If they have a beer that is not selling the price goes down and it adjusts as each beer is sold. Its fun and really different.
"Now back to the whole NYSE description; this new bar will have 72 beers (from around the world) on tap with the price of the rotating taps fluctuating based on supply and demand. Tell me that isn’t a brilliant idea! If you’re a beer snob (like moi), be prepared to shell out some cash on those extra hoppy IPAs."