Head for your bars first (open till 3am usually) as clubs never get started at weekends until well after 2 am, (and 
several "after hours" keep going till after 
midday the next day). Madrid's Simple Life - To 
the outsider travelling alone, Madrid may seem like an extremely glitzy place filled up with glamorous revelers on their way to a 
single swank party or another.  Since alluvium is incredibly soft, it erodes in a really 
short time or might be quickly covered over by new deposits, thereby quickly hiding proof of 
earthquake fault lines.