I recently discovered that Berkshire County has its own currency — BerkShares. There was a BerkShare festival in August, but I was unable to go to learn more about this local cash.
BerkShares are largely a southern Berkshire County idea, designed to promote shopping in local stores. You can purchase the Berkshares with normal cash, at a 10% discount. So, you can buy 10 Berkshares for 9 dollars, and then you can spend your 10 BerkShares at a participating shop (again, most of which are in south county).
One of the best places I can think to utilize BerkShares is at Guido's Fresh Marketplace in Lenox and Great Barrington, one of a handful of specialty (pricey) food shops in the area. I will happily take 10% off my Guido's food bill!
In the meantime, I'm hoping the BerkShares idea catches on and spreads to my north county neighborhood.
Here are some images of the currency from the BerkShares website):