The number of tickets sold for events
If an opera or whatever it is you are into is on for 6 nights but only has decent attendance on two then that's a poor attended event
On the odd occasion bands do get a slot at the millennium they normally sell out sharpish
There just isn't the population or demand for off the wall stuff which is the sort of stuff you clearly like
It's not that I don't like it , it's that very few other people do either
Cardiff is not a cultural city , never has been