Check out this new Monthly Meetings Report! You generate it for a group of organizations from the Organization > Search / Manage page.
This is a great, easy-to-read report. It contains all the organizations in your list, the attendance for each meeting of the month in addition to the average for the month selected.
This is a very quick way for a minister, at the end of the month, to check the attendance for a group of classes for which he is responsible. I like to filter by Program-Division-Schedule, but you can use whatever works for you.