Gambling by non-guests hinges on such distinctions.
How can any business survive such micromanagement? And why should only The Greenbrier face a ban on bringing in busloads of day-tripping gamblers?
The Greenbrier's identity is as an exclusive resort, and owner Jim Justice spent millions to buy and refurbish the historic resort. He put up millions to get the PGA to add the Greenbrier Classic to its lineup.
But revenue from day-trippers would be as useful to him as it is to the owners of the four other casinos.
Perhaps the law, not the institution, should change.
For two decades, West Virginia enjoyed a near monopoly among neighboring states on gambling. The state's five casinos added $378 million to the state's coffers in 2011.
But Ohio, Pennsylvania and Maryland have legalized casino gambling to draw dollars to their treasuries.
Might it not make more sense to even the playing field for The Greenbrier and welcome visitors from Virginia?