Why aren’t more bands like Transglobal Underground? This is not a fatuous question. After all, we live in a joyously multicultural society so one would expect more ethnic influences would have seeped into the mainstream by now. But no, apart from some African guitar riffs adding a veneer of ethnicity to the occasional white college-boy rock group, and some bangra beats spicing up the odd dancefloor hit, the UK and US pop scene seem on the whole to remain hermetically sealed against such exotic musical DNA.