While I stand by my belief that the penny is lousy as currency, someone has finally come up with a use for pennies that has made me reconsider my extinction argument: make a floor out of them! The penny floor can be found at the Standard Grill at the new Standard Hotel in New York, the one straddling the High Line. The Standard tells us that it used 250 pennies per square foot, or 480,000 pennies in all.