It’s the end of a fun evening at the Bowen house, but nobody is quite ready to quit yet. Jack starts padding a cool swing rhythm on the house bongos and Randy jumps in with a bass line that fits it to a T. Charlie gets the chords going, just as Danny flies in with that cool melody over Sam’s smooth harmonica fills. Now, it’s a tune that’s not really in our repertoire. It’s more like an old friend who drops by way too infrequently, but when he does, everyone in the room is happy to see him. Here’s “Opus One.”