If the Guardian hadn't given Will Hodgkinson £5000 to start a record label then Londonist wouldn't be spending Friday night in a folk club in Euston. But we're here for the album launch of Rosemarie, the debut long-player from new young folkers, Thistletown. Strangely the place does not fully resemble a hive of outcasts from The Wicker Man: bristling beards and woolly jumpers, curling tresses and flowing dresses. There are day we say it,......