I am about to "invent" an extension to the iCalendar MIME type.
A calendar event may be one, where you need to pay money to get in. Since there is no such thing already defined in any RFC, I will go ahead and use my own form. But in case this takes off and everyone wants to have it, it would be good to come up with a proper term in the first place. So I am wondering, what's the most appropriate term therefore, according to most general usage and international meaning. Here are some terms, I found so far:
Any other suggestions are welcome, of course.