When the sun sets, venture east to Zizkov, a former industrial suburb and the epicenter of Prague's rough-and-tumble nightlife. More than 300 bars dot the neighborhood's 2 square miles (5 sq km), which almost certainly represents the highest per capita concentration of drinking venues in any district in Europe. Leave your fancy dress at home. Zizkov is a place of convivial dives, replete with beer served in plastic cups.

• 1. Zizkov
  Prague, Czech Republic 50.0874714.46941