Nope, still extra-curricular, just like the food is still theirs to make available or take away as they see fit. This is a shady tactic you and the employer can both use. I wouldn't though.

let me elaborate. if someone looks me in the eye and says, "Don't forget that we never work weekends, how much is that worth?" then they are not my friend. That's a given, it's part of a 40-hour job not to work weekends. To put a price on it and have me concede part of my salary means they don't have my interests at heart.

Now, you might say that negotiators don't have to have the other guy's interests at heart. Then maybe you can read Getting to Yes ("the Harvard principle") or even the old How To Win Friends and Influence People.

the toughest negotiators usually end up having no one to talk with but mud with a stick in it. If all you want for an employee is a mud with a stick in it, by all means, harp on about how elephants do not trample around your premises, there are no monsoons in the area, and other employees don't use the outhouse or squat outside to potentially poop on them.

But if you want a quality employee, an actual human, then the negotiation that works on mud with a stick in it will not be very compelling. Or honest. Pretty soon you won't be negotiating with another human again.