They have already thought of that. Any place that has employees will be under the orders. That's how they have done it in most places.
In any case, if people don't stand up for their rights on principle, they can forget having rights and just settle for a game of cat and mouse with the armed thugs.
Then, they can refuse service to whoever they feel do not fit the clientele that they want to serve.
It won't work, and if it does, it won't for long. It's almost time.
Bar and restaurant owners think it won't happen to them. Then, when they find out that it CAN happen to them, it's too late.
So many restaurants have been hurt bad by smoking bans. Check out: