We've just reserved our hotel room for Eastercon 2014. The con is being held in the Crowne Plaza Glasgow. The online booking system helpfully gives an indication of how far the various con hotels are from the venue.
One property of a metric is that the distance from somewhere to itself, d(x,x) = 0, for any x. However, the booking system seems to be using a more science fictional metric, since it thinks that d(Crowne Plaza, Crowne Plaza) = 176 yards.
Possibly the hotel is beside itself with joy at hosting Eastercon?