> Having a drink in the workplace aftera day of hard work works great for morale.

So do many other things. If the only thing that keeps morale acceptable is providing alcohol, then you have a problem either with the people you hire, the work you make them do, or the amount of resources you're willing to expend on morale.

The fact that other things also boost morale does not invalidate the point that having a drink in the workplace boosts morale. And nobody has even implied that workplace alcohol is the _only_ thing that keeps morale acceptable.