A few weeks ago, I praised a new musical revue I saw called L.A. Now and Then. It was up for a limited engagement and it's closed now…but that's no reason not to let you see its opening number. The first gent you see there is Robert Yacko and he's soon joined by the entire company, most of whom are theater students at Los Angeles City College. The song was written by the show's conceiver and director, Bruce Kimmel…