Ascribe lets you mark attendance for people to any event. To do so, first navigate to an event. Then click on the Add Attendees button in the row of function buttons at the top of the event record.
Quickly add attendees
Easy to use attendance form allows you to quickly search for persons and add many attendees without having to wait for the form to reload each time. Typing the first few letters of a name brings up a listing of matching person which you can select and add as attendees without page reload.
You may click the checkbox to the right of any person in the search results (found in the second column) to mark them as having attended the event.
Or you could use the Quick Tools in the third column to mark everyone in the search results as having attended or just the people in the page of search results currently displayed.