The real question now is, when Marco's wife calls him from the listening room
It depends upon the circumstance. Should I happen to be listening to music she doesn't appreciate, and perhaps a bit too loud for her tastes (usually the case anyway), and she's in a particularly bad mood...well, I couldn't print the things she calls me or it would kill this thread! Otherwise, yeah, just "Marco" usually does the trick.
Prounounced: märk-O
I've only do the "Polo" bit if I'm in the bathtub.
Marco