Wow. That was really nice. It was beautifully constructed, and the pacing was perfect, never too fast or too slow. I loved the subtle and slow way you revealed that the piano player was Jones, the slow warm-up and exchange of information about superiors, and the growing bond that forms between Z and Jones. My favorite exchanges had to be the very last one ("Would you like to come up?" and "I've learned that some people find breaking and entering an awkward form of foreplay.") and the one where Z asked whether Eroica slept with all his men.
Anyway, enough babbling. I loved it. Thanks so much for writing and posting it.