Hi Zdenek,
it's allways the same, Labs don't make B&W photos perfect,
You may try it with Fomapan 100, you can get it near Mustek station in the fomashop, they also have a lab-service.
But ofcourse start to develop it by yourself.
Hey Zdenek, you own a perfect Leica MP (me too 🙂 ), so start your work in bw at home.
You know your Leica works perfect, the films Tri-X or Fomapan are very good, and ofcourse, Praha is the city of Black and White photographie.
Remeber Sukek, Janda, Funke Kudelka.....
Go to the Sudek Atelier in Uyezd Street an buy the wonderfull DVD about Sudek and feel the outstanding spirit in Praha.
Sorry, I'm so glad about my 10 days in your city, I can't describe it.
Best regards
martin