The main street in the city is often familiarly called "Karli”. There are plenty of great restaurants, bars, and shops.
Wikipedia (German) http://de.wikipedia.org/wiki/Karl-Liebknecht-Stra%C3%9Fe_(Leipzig)
Address 86 Karl-Liebknecht-Straße, Leipzig 04275, Germany
Coordinates 51°19'14.984" N 12°22'24.578" E