As a private business, there's an obvious solution - if you can't prevent them from wearing the buttons, simply terminate any employee wearing one.
If they're not going to be grateful for...
I hope the employees enjoy the hassle of commuting downtown.
Opt-in nothing; my local D&B no longer provides paper tickets for most games, meaning there is no choice but to switch to e-tickets.
The closures were done without any notice, and as has happened all too often of late employees found out when they showed up for work.
I realize there are a variety of reasons why notice...
Then Zoup! Is free to pay their workers whatever they like.
It's their desire to impose their demand upon others that makes minimum wage laws so insidious.