I would like to add that although I do know who the Wombats are I do find myself surprised (not angry) when an act I've never heard of comes to town and sells out the club.
Unfortunately I think it says more about me than the act or their fans, though.
indeed. that's rather self-aware of you... i like.
when an unknown band sells out the club, my first thought is "maybe i should check them out". hit rate is pretty low (hence the maybe), but i'll still give some of them a few minutes on spotify/last.fm/myspace/etc. ya never know what you'll discover.
your post made me think of a possible explanation for the anger: "i'm a music guy, and i'm into
good music, therefore any band that i haven't heard of must automatically be
bad music. how dare they sell out a club!"