Just an idea, but instead of a 8 or 9 band show once a month or more, have 1 show with 3 bands MAX every week. You could organize it quite well on the board here, or on the Legion website. Bands that want to do that would have a rep from each band put down when they want to play and other bands can join a show. Plan
This would allow each band to play at least once every 3 weeks, extend their sets to about an hour, and get people who go to metal shows to stick around for the whole show instead of copping out after 4-5 bands.
I'd rather hear 3 bands play than 8 bands personally. Having 8 bands is cool because you see and hear so much varied metal, but people may get tired after hearing the same style for 6 hours.
Spme people go to shows with the intention of seeing 1 band. With less bands playing they wouldn't have to sit through 8 bands to see the one they wanted to see.