Absentee report - two services

[GraceAdmin]

We are in the process of adding a second service. I want to be able to track attendance separately for the two services. BUT, I want to be able to run an absentee report that will summarize for both services. I.e. If Sally Sue doesn't always attend the same service how can I keep her from showing up as an absentee? I'd like to be able to run the report with both activity codes instead of just one. Is there any way to make that happen? Or do these folks have to pick a service and stick with it?