From experience, a) any music in a performance
venue is probably still going to be considered a public performance even if it is only two people listening, so all rights issues probably still apply and b) be careful of what you
play when others are around. I've seen the latter be an issue more than once in venues where there may be other users, clients,
etc. present at times. The company I worked for some years ago almost lost a major client when when of their female executives walked in and took exception with some of the video used during the
system adjustments. The images were scenes on a beach from a test and setup disc that Sony provided and were hardly controversial, but all that mattered was that she took personal offense at being 'subjected' to them.