If you have an Organization, such as a Community Group or Sunday School class, that is divided into small groups, you will want to check out this feature. On the Meeting page for a specific meeting, look under Other Management and you will find a number of options. One that I want to point out to you is called Attendance by Group.
This report provides teachers and group leaders with a quick look at how many (and who) from each small group attended that meeting. It also lists everyone who was absent as well. If your choir has their members in small groups by voice part, this report will be a great way to see how many sopranos or tenors attended a given meeting.