Maybe there could be a compromise. I know at my school we had a similar issue. There were several groups at total and wanted to participate in COB, so Panhel decided to comrpromise by allowing those already at total to take enough girls to go 5 over total. So with people dropping out over the summer (we had COB in the fall), that worked out to be around 10 girls for those chapters. (A considerably smaller number than those chapters who were actaully allowed to COB). So everyone got to participate and everyone was happy.