PRWeek also entered the event, organised by BNFL corporate affairs chief Philip Dewhurst, who chairs the guild's charity committee.
Finsbury emerged triumphant, beating Weber Shandwick Square Mile and the IPR into a tie for second (PRWeek came sixth).
Given the charitable aim of the contest it was amusing to hear that Finsbury got so carried away with their victory that they failed to pick up their £15 bar tab.
When we call Roland Rudd's mob to ask what on earth they were thinking, it is agency partner Morgan Bone who is designated to cheerily return our call.
Bone fesses up: 'I can - and have to - confirm that your information is true.'
But he reassures us that the tab has now been settled, adding: 'The only thing that's slightly embarrassing is that it wasn't a bigger bar bill.' In the raffle meanwhile, Luther Pendragon partner Mike Granatt won a DVD player. A renowned gadget junkie from his days in government communications, he lived up to his old nickname - 'Metal Mickey'.