The piano lounge on the 747 did exist -- I remember reading about it at
the time (circa 1968), and a web search turns up this site:

    http://www.algonet.se/~hansj/747/adler5.htm

Here's a partial quote from the site:

  "In the U.S.A., the Federal Aviation Administration (the governing
  body of aviation) initially denied carrying passengers in the upper
  deck area of the 747 due to unacceptable evacuation procedures.  The
  upper deck then became the premier First class lounge area complete
  with a piano and a full wet bar.  Finally World Airways proved the
  upper deck could be safely used to carry passengers and the "lounge"
  area soon vanished."

Bill Burns
Long Island   NY   USA
mailto:billb@savvy.com