The city never sleeps...

While in Hobart, we stayed at this inner city pub. The service was friendly, the rooms were spacious, but there was one largely predictable downside - it was quite noisy at night. First there was the noise from people leaving at the early hours of the morning (our windows were the ones on the far right of the picture, just above the main entrance). But then, when the other noises had died down, the was a strange dripping sound that just never seemed to stop.

Can you guess what it was? There's a hint in the photo...

( Answer behind cut... )