Before becoming Prime Minister Bob Hawke was active in the Trade Union area and in that era drank a lot. While at university (in the UK) he had set a "world record" by skolling two-and-a-half pints of beer in 11 seconds. This was University College, Oxford and Hawke was a Rhodes Scholar. Pretty sure calling it a world record was a student joke.

Hawke gave up drinking when he went into politics in 1980 and did not drink while he was PM. He started drinking again after leaving politics in 1993.