Is it possible to count attendance of a service manually rather than checkin specific people

[ryan-rutter]

We have Sunday morning church service, and we currently counting each week how many people were in attendance. We don't need to know names or any other details, but rather how many people were in the building on that day or for that service. Is there somewhere in B1 that this could be captured and where we could visible see this information displayed in graph to view trends etc?