Pump Boys and Dinettes *****
      By: Paulanne SimmonsMamie ParrisThose of us who frequently see the very fine Encores! musical revivals are used to having the musicians onstage. Most of the time, they play their instruments, and that's about it. Pump Boys and Dinettes, however, is a very different kind of show. Written by John Foley, Mark Hardwick, Debra Monk, Cass Morgan, John Schimmel and Jim Wann, Pump Boys and Dinettes …