The Metropolitan Jazz Band was founded in the year 1972 by trumpeter Josef Krajnik. Originally playing Dixieland music, it has developed into a full professional orchestra with a very broad repertoire, ranging from blues to Dixieland and mainstream.

The sound of the MJB has remained the same through several personnel changes owing to the unmistakable trumpet playing style of Josef Krajnik. His style originated in that of Louis Armstrong. Roy Eldridge and others. The arrival of young musicians has caused a move to a more modern approach to harmony and arrangement of individual compositions.
In particular the rhythmic group together: piano, bass, electric guitar, drums and percussion, forms the motor of the orchestra. Here the dominating factor is pianist Radim Linhart, who belongs to a new wave of young professional musicians.

The MJB presents itself also as a perfect accompaniment orchestra for various soloists. Presently it is accompanying the brilliant jazz singer Jitka Vrbova, who has taken part in various TV programs and at representative festivities such as gala evening events and parties for companies in the sound equipment business, such as SONY, IBM, SIEMENS et al. The primary concert activity for the MJB has been taking part in many jazz festivals around Europe. These are e.g. Heidelberg, Regensburg, Munich, Nurenberg, Dresden, Berlin, Eisenach, Jena (all in Germany); Breda, Eindhoven, Hertogen-Bosch (in the Netherlands); and Dodermonde, Brussels (Belgium); Copenhagen (Denmark); San Sebastian, Murcia, Alicante (Spain); Warsaw, Krakow, Poznan (Poland); Budapest, Tata, Szeged (Hungary), Moscow (Russia); and Kiew, Odessa (Ukraine).