Haghj -
Good point...there is a different between rehearsing a band (songs) vs. jamming.
Personally, I can't stand aimless jamming. To me it's a waste of time and I lose the little interest I might have after 5 minutes. By then, everybody starts repeating themselves. Yes, when you don't have a good list of songs you can play together, it becomes problematic.
Kasperow - perhaps your bandmates are of a similar mindset?