From 2011: For the most part I've only talked about it in passing on this blog, but a year ago I started writing a one-man play about Louis Armstrong and Joe Glaser, his longtime manager. (The same actor plays both parts.) The play, which grew out of the research I did for my recent biographyof Armstrong, is called Satchmo at the Waldorf, and a couple of weeks from now it will become more than just a furtive gleam…