Why not carry a small MP3 player with you? I have a nice set of headphones (Koss Titanium for only $19.00, can be ordered from the Koss website) They sound almost as pleasing to my ears as my DT770 Pro Headphones costing $200.
I always have an MP3 player and the headphones with me every where I go. That takes very little space, and I have never had anyone "too busy" to listen. Sometimes they want to listen longer than I want them to listen. I even had a club owner plug my MP3 player into the house system before. Being really self conscious, I am never prepared for something like that.
Maybe that isn't a great solution either, but it is a TOOL for your arsenal. Now days you need every tool you can get.
Not only that, but when I see other musicians and they ask what I have been doing, I can hand it over and bore them to death with my music.
If the club owner or the barkeep doesn't listen, they aren't interested in hiring a band anyway, no matter what you do.
More likely than not, they just don't have the man berries to tell you.
