Math rockers Foster Parents join up with veteran Shanghai post-rockers 21 Grams this week for a special Thursday evening show. Foster Parents’ Grim still lives strong in the minds of those who have heard it, while the band have also made a number of appearances on compilations by labels like Qiii Snacks Records et al. 21 Grams cinematic preoccupation has seen them name their band after a Alejandro Inarritu film, with songs entitled ‘Brokeback Mountain’ and ‘Vanilla Sky’.