Of all the forms of mid-century pop music, the one that has resisted revival most devoutly is folk. Easy to see why: the music was both cheery and pompous, cleaner than Harriet Nelson's kitchen and nearly as white as the 1963 Masters tournament. In many middle-aged minds, the old folkies linger as a vague adolescent embarrassment--the musical equivalent of sophomore zits.
So Christopher Guest had to make a film about them.
Waiting for Guffman and Best in Show, the two earlier improvised comedies Guest assembled and directed, are about people whose dream of achieving an obscure goal (putting on a...