I have tango friends/acquaintances and I have non tango friends and I love it when my non tango friends come and join me for tango evenings. It is something, they are indulging in just for me, to support me. Only true and good friends will take out their time like this and it actually touches me. For people who do not do tango themselves, just sitting and watching might not interest them but only good friends can do that. The most precious thing we can give to each other is our time, our support, the feeling that- "I am there for you". "I am a part of your life." "I am a part of your journey."
A friend is someone who is there for you when they can be rather anywhere else.