Yes, you can record out of school activities, e.g. clubs, as well as recording payment for trips or return of permission slips via the Ad Hoc Register. You can set this up in Admin>Config>Ad Hoc Register.
The activity appears in the daily classroom register (Home>Register) and a student's attendance at a particular club, or other activity, is recorded by turning the cross into a tick.
To add a new item to the register simply choose the Add New button.
You can then enter the Ad hoc column name and the days of the week when the activity takes place, then select Insert.
To edit an existing item simply click on Edit button to change the data. You can now save your changes by clicking the Update button.
These additional items will now appear in the classroom register. The teacher will now be able to record if students are planning to attend a particular club or activity by clicking on the cross, changing it into a green tick.
You can access this data via a report in Reporting>Reports>Attendance (tab)>Ad Hoc Report.