I can't comment on the locals or the music as it has been a long time since I attended.
I think the fact there is so much on these days will have something to do with it. I am not just talking about your club Ady. It is happening all over.
Yes things are also more expensive these days so perhaps bi-monthly is the way to go.
When venues are on every month people tend to think I can catch it next month if I don't go tonight.
But if it is on every other month, if you don't go, it ends up being 4 months since you last attended!
This should encourage people to make more of an effort.