Clement mentions Bernie Bermbaum being in the ledger. This was John Turturro's character in Miller's Crossing (1990).
A church key or a churchkey is a North American term for various kinds of bottle and can openers. Reportedly, the term dates back to the 1950s. The glass bottle cap (called a crown cap) was invented in 1892 and the shape and design of some of these openers did resemble a large simple key. After 1935, flat-top beer cans were first seen, which made a lid-puncturing device necessary. A church key came to be used for the new invention, constructed from a single piece of pressed metal, with a pointed end used for piercing cans, invented by D. F. Sampson for American Can Company. They showed operating instructions on their cans, and typically gave away free "quick and easy" openers with their beer cans.