Soooo I guess you've all been mugged and mistreated in Usera, Villaverde and Orcasitas...or is it just barrio rivalry??
Well I think you should go to the Castellana-Santiago Bernabeu area with a Barcelona footclub shirt on and enjoy Madrid nightlife....just joking!
There are great spots in most barrios in Madrid, places worth visiting just like anywhere else in the world. If you want to have "tapas" you have to go to the barrios, if you want to enjoy night life you have to go to the barrios as well. jysuper try getting on one of the "buhos"-night buses at midnight in Cibeles and ask the locals "donde esta la marcha en el barrio?" and then you'll realize what is going on.