The simplest answer is to establish the cost of the meetings. You could say that they cost P (avg. hourly payroll) times N (number employees) times the number of hours per day. Say that six $25/hr employees spend four hours per day in meetings. This is $600 per day or about $3000/wk or $150,000/yr. Do the meetings improve the business by $150,000 each year?
That's really the question.
Patient Professor Bill