I was once on a team where each of use would take turns getting a round of drinks in (zero cost i.e. free tea, coffee, water etc.). Some would get it more often than others but this tended to be a natural balance as those of us who got it more where the ones who drank more. There was one exception. One chap thought that it was beneath him to get drinks. After a couple of months of trying to cajole him into just getting one round in I realised that it was winding me up. So I stopped asking if he wanted one. When asked I explained to him that I felt it was unfair, it was winding me up and if he wasn't prepared to occasionally get a round in then I wouldn't get him one so that it no longer bothered me. He called me "petty". I didn't care.
The brewing up situation used to be more political than a United Nations meeting. I quickly decided that the easiest thing to do was stay out of the whole team rounds and just get myself a drink as and when I wanted one. I didn't expect anybody else to make a drink for me either. I'd watch other members of the team go a whole day without a drink because it wasn't their turn and they were waiting for somebody else to do it.
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