Every year, we have people show up who didn't plan to attend, and we have people who drop out after I've submitted the application. Nancy, the parade organizer, needs to have a count of the cars so she can plan for placement in the pre-staging areas.
When I submit the application, I have to tell her how many cars. A variation of a few cars isn't a problem, but if we only submitted for 1 or 2 and 20 showed up, well you could see there may be a problem.
If we had to pay an entry fee, it would be an entirely different matter, as far as the club's concerned because it would be money wasted, but since we're a registered non-profit group, we get free entry.