Venue: Edison Theatre, Washington University, 6445 Forsyth Blvd., St. Louis. Tickets: $20 to $50; contact 314-534-3807 or theblackrep.org. Story: A man welcomes us to the sleepy little hotel in Chicago where he regularly hangs out with the band at the bar. He’s dressed to the nines in his sharpest 1930s finery, and he’s ready to regale us with stories and songs dealing with the musical genre known as the blues.