The opening track and the first maxi single from this album was "Calle melancolía" (Melancholy street), a song which revolves about feelings of loneliness and depression.

In general, musically, the melodical sounds would prevail in this album, such is the main characteristic of the following maxi single and probably the most popular one of this release, "Pongamos que hablo de Madrid" (Let's say I'm talking about Madrid)[3] a song that was originally written by Sabina but which had been previously recorded by Antonio Flores, whose version reached the number one position of the Los 40 Principales chart.

The B side of that Maxi single was the song "Círculos viciosos" (Vicious circles) a more cheerful rhumba composed by Chicho Sánchez Ferlosio.

The melodical sounds of this album continue until the ending track entitled "Pasándolo bien" (having a good time), which had a more accelerated rhythm with less presence of acoustic instruments and more electronic vibes.

Unlike "Inventario", his previous release that only sold one thousand copies, Malas Compañías received a better welcome both critically and commercially.