According to the devil's dictionary: MAMMON, n. The god of the world's leading religion. The chief temple is in the holy city of New York. http://www.richardgingras.com/devilsdictionary/m.html
Imagine that! New York....JW's aren't the world's leading religion but Bethel is in NY. So shall we say, instead of "You cannot serve God and Mammon," 'You cannot serve God and Jehovah'?