Hey @willpower1,
The software is designed to assume there is a maximum number of available tickets, instead of a minimum. Most venues are going to have an upward limit of the number of people it can hold (even events that are outside) because of limited area or limited seating. In the case of a minimum number of tickets, I am not sure I understand the motivation for the question. I can only think of a couple situations that you may be talking about, and each of them result in a ‘no’ answer.
If you are talking about requiring a minimum number of tickets to be purchased at once, then the answer is currently no. If you can provide me with a good use-case, I will pitch it as a feature in on of our staff meetings. If the idea is a universal one, we will get it added into the core software. If not, then a separate plugin may have to be made for this, or there may even be one for WooCommerce core that could repurposed for it.
If you are saying that you want to require a minimum number of tickets to be purchased in order for an event to actually take place, then there is no facility built into the software to handle this. On that note, I am not sure I can think of a good use for this in any form, since the end users who did purchase tickets, already spent money. Thus, cancelling the event because not enough people bought tickets would be a huge customer service problem, that I am sure nobody wants to deal with. For this one though, realistically, you could probably pull this off without an addition to the software at all, since this is really a business logic question rather than a software feature.
In the event that neither of these things is what you were asking, please, feel free to explain it with more specific details. With more information, I will be able to have a clearer mental picture of what you are asking, and thus I will be able to give you a more specific, accurate answer. If one of these are it, then hit us back with a good use case, and we may get it added into the software as a feature.
Loushou