GRIM (Groupe de recherche et d'improvisation musicales, roughtly translated Group of Search and Musical Improvisation), based in Marseille, France, is a non-profit institute for improvised music and experimental music. GRIM bases its activities at Montévidéo, a site of contemporary creation in Marseille.GRIM is a voluntary association (association loi de 1901) funded by the city of Marseille and focused on organising musical events. The organisation hosts concerts, workshops, lectures, artist in residence projects, recording sessions and has a multimedia public library with books and music related to avant garde music, experimental music, improvised music, sound art and contemporary music. GRIM was raised in 1978 by guitarist and composer Jean-Marc Montera. It also organises or co-organises the festivals Nuit d'Hiver, and Sonic Protest. GRIM has recording studio, a library, two concert halls and small one and big one.