OOOH! I LOVE etymology (and I know Liz loves Entymology)
The Phrase "Skid Row" which we associate with disreputable areas was originated from the term Skid Road which were the tracks that loggers used to slide (or skid) logs down. The surrounding area was inhabited by loggers first, then by hobos, hence the disreputable association. I *believe* the term originated in Seattle.