@Setanta,
I stayed with a friend of a friend. On my first night, in what everyone said was a rough neighbourhood, although it seemed quite nice to me, I slept like a log. When I got up the next day everyone else was bleary-eyed. There had been shots fired next door, police sirens, the works. I slept through it all, actually it was the best night's sleep I'd had all holiday. A bit like the scene in My Cousin Vinny when he's locked up in the cells overnight.