Well, I don't think that it matters if its 10, 20, 30 or 40%. And it does not matter if it's alive or death.
What it matters is the meaning and I think its completely diferent (PERFORMANCE vs COMPOSTITION)
Having a room dedicated to improvisations could really bring more sheep into the fold, however, I wonder if by itself it would be neglected and forgotten. I think that is a real possibility if it is a sub-board and not an actual board by itself on the main forum menu.
Also, it seems that the "Index of improvisations" topic started by Derek has gotten quite out of date; and Derek himself hasn't even logged in for quite awhile..
It seems that the activity in the improvisation board is going down. Now my question: wouldn't it be an option to create a new main board "Improvisations" instead of a child board? This could be audition room as well as a place to discuss improvisation.