“It feels like an attic in here.” This is the first thing a friend says to me when we walk into the upstairs room of the Roisín Dubh on a Saturday to catch one of the last shows of Los Angeles duo 100 Onces’ extensive tour which saw them travelling around the UK, Eastern Europe, Russia and back to Ireland. The feeling that we’re in an attic is largely owing to the lack of much light of any sort and the cluttering of three band’s worth of equipment in the corner. It’s not a bad feeling at all, and it…