Is an event ever cancelled if enough seats aren't sold?

Sorry never experienced that either.

I doubt it

No

Not to my knowledge.. This has never happened in my experience

You should call them to be sure.

I wouldn't think that would happen but an email to them or checking their website should answer your question

Wouldn't think so but you need to call.

Not sure, call or email them

I'm sorry but I cannot answer your question because I have never experienced that before