Fuuuuck I love giving people free beer. Especially the stuff on tap. Because I can draw up a perfect draft of scotch ale with no collar (good skill to have) and then tell them “no yeah don’t worry about it that’s on the house” and it makes their entire evening. (And then sometimes they put their cash in the tip jar instead.)
Crucially, I can only do this occationally and only when the boss has left for the evening. And it’s usually the leader of the band.