Despite all the sophistication and the reputation as a haven for financial magnates, the city of Frankfurt has its share of beggars and drug addicts. At night, you may come across people smoking marijuana or injecting themselves with drugs in the streets or parks. They show no concern for tourists and don't even attempt to find a secluded spot.
If you're interested in knowing the names of dangerous areas in Frankfurt-on-the-Main to avoid, one of them is Bahnhofsviertel. It is located between the central railway station and one of the financial districts of the city.
If you're interested in what goes on in this "infamous district," you can visit it without worrying about your safety in Frankfurt-on-the-Main. You can do so with local guides who offer a tour called "Sex, Drugs & Rock'n'Roll." The program includes visits to local football pubs, small Italian restaurants, and exclusive German clubs. That's the "positive" part of the tour. However, during the walk on Kaiserstrasse, you need to be extremely cautious. There is a special club there for drug consumption. The area around it is littered with syringes and needles, and its intoxicated clients often crowd or even lie around the entrance.
There is also a district called Elbestrasse, which is a unique red-light district in Germany with many brothels.
