That’s were the lack of firearms shows up pretty drastically.
We have a few (about half-a-dozen) cities in the Czech Republic with areas like that, but nothing like that in the rest of the country really. Including Prague.
There was this politically incorrect joke after Czechoslovakia split.
It advocated invading Slovakia and occupying it. The plan was as follows:
Week 1: declaration of war on Slovakia
Week 2: invasion successful, Slovakia surrenders
Week 3: wellfare payments now available only in occupied Slovak territory
Week 4: all gypsies had voluntarily moved back to Slovakia. Slovakia given full independence