It’s the last day of work for Valerie Arganbright, managing director of membership at Minnesota Public Radio, first hired by MPR in 1990. So 89.3 The Current had a special Coffee Break chock full o’ tunes with Valerie in the title. Because, as one commenter pondered, “I guess it was too hard to find songs with ‘Arganbright’ in them?” One suggestion: “Ride of the Valleries” by Wagner.