After the last strains of the first song, “Strangers in the Night,” at last night’s Cosmopolitan Cabaret production of “My Way, a Musical Tribute to Frank Sinatra,” singer Karole Foreman (Woman No. 1) leaned into the crowd and whispered, “I bet everyone in this audience has a memory associated with that song.” Do they?  I had to ask myself if only gray-haired Sacramentans might be moved and entertained by a local show of Sinatra medleys. In truth, the answer is complicated. Last week, my 18 year-old son was driving me around town with his iPod plugged into the stereo.  He played, his choice, not mine, a remix of that very song, "Strangers in the Night," by the young Berkeley band, The Mor