Complex sentence: Frequents the artists' Caffè Giubbe Rosse, meeting point for the intellectuals known as the Ermetici Group (Eugenio Montale, Carlo Bo, etc.) and has close contact to the painter Ottone Rosai and the poet Mario Luzi.
Split into simpler sentences: Frequents the artists' café Le Giubbe Rosse, meeting point for the intellectuals known as the Ermetici Group (Eugenio Montale, Carlo Bo, etc.). He has close contact to the painter Ottone Rosai and the poet Mario Luzi.