It's funny you say this because most of my friends in real life, in fact, almost all of them, wouldn't know even one "indie" band from the past 15 years. And, of course, my tastes and theirs intersect at numerous points, because like most music lovers, my tastes vary and are not limited to one genre or broad label.
And that's exactly why I like this sub-forum, so I can get pointed towards bands I'd normally never come across. I probably like 3, maybe 4 in 10, but that's still me operating in the black, and I'm thankful for it.
Guys like Zoots are great and all, but I don't think he ever once named a song, album or band that I hand't already heard of and had an opinion of. That's not a bad thing, of course...there's nothing wrong with talking about Bon Jovi (take it easy, Laz) with fellow fans....it's just that I can engineer that sort of discussion with just about anyone.
In many ways, I think that's why music forums like this tend to focus more on smaller bands / independent artists. I can discuss bands I like that everyone knows about with my friends and people at work, you need the internet to find other fans of smaller lesser known acts.