The style of grunge itself can be linked with the various styles and subgenres of music of the early nineties that were in all probability largely influenced by the Grunge era. For example, one notable and influential genre of music was instrumental Grunge. This is a style of rock music, where most of the music has guitar, bass, drums and synthesizers. Another influence of this style of music was by all means influenced by the genres of post-hardcore, emo, hardcore and many more.
One of the major influence on the Grunge style would be Nirvana, who are probably the most well-known band of the times when most people consider to be the time of the midlife crisis.
In fact, the grunge wave of music, which was quite influential, in part, with the grunge era, was mainly initiated by the musical career of the band. Their song “Smells Like Teen Spirit” is widely acknowledged as being the genre’s first single.