The noise is unmistakable, though it’s heard at fewer and fewer casinos these days. Clank-clank-clank-clank-clank. That’s the sound of money — metal coins hitting a metal tray — signifying slot or ...

For the last fiscal year, coins have accounted for less than 3% of the $50.5-billion slot machine drop, according to the Nevada Gaming Control Board. Just a handful of properties on the Strip have ...