My suggestion is, don't waste your time trying to bring someone into the fold. It's likely to be less than fruitful. There is nothing wrong with inviting people to listen to your system. Maybe that is enough to get them started on the path, but doubtful. I wouldn't even bother to give unused equipment to someone. Chances are they will take it if offered, but they probably won't appreciate it. If they are really interested then if you offer to sell it at "deal" type prices then they would likely buy it.
It's not just audio. This would apply to almost anything. I used to work part time in a scuba dive store and would see couples and friends come in together to learn to dive. Very rarely were they equally enthusiastic about it. Not saying that they didn't want to do it, but you could almost always pick out who was driving the adventure and who was along for the ride. Sometimes they would stick it out past certification and make it to a year or two. Very rarely would it last, for both of them, longer than that.
My wife has recently gotten into mountaineering and has tried to get me into it too. I have the good sense not to go down that road, for multiple reasons. I support her fully in her endeavors, but no thank you. I fully understand her desire to share her new found passion with someone, but it is not going to be me, and it doesn't seem to be any of her friends either.
I too would love someone to share my love of music with, but I know for it to be real it needs to be organic.
I too, like another poster, believe that this is a niche hobby. Lots of people play music, but very few will actually sit and listen to music without multitasking. Just listen to music. Music for most is something in the background; something extra, but not the primary focus. That's why most aren't willing to spend money on the hobby beyond what's needed for background music or what's needed to make it more convenient in some way. There is just no value in it for them.
Sorry if all that sounds harsh, but that's what I believe.