Has anyone had success converting friends?

As many times as I invite friends over to listen to my stereo and explain to them the virtues of a great system, none of them ever catch the bug. All of them are extremely passionate about music and are intrigued by my set-up, none of them ever go out and buy good stuff. This is frustrating. I see them spend money on a bunch of other things, but never good audio. I have been unsuccessful at converting one single person to the audiophile bug.