Most of the charm of "Non-Negotiable" is not in what is being presented, but how it is presented. The story itself doesn't sound all that special. A hostage negotiator has to handle a terrorist situation where both the president and his wife are being held hostage. The film is a tight 77 minutes, but what they choose to show is interesting.
For example, during the hostage situation, our main character, Bender, calls the babysitter to let her know that they will be running late. The babysitter then asks for Tuesday off, and Bender tells her that Tuesday doesn't work, maybe Wednesday. Your wife is being held hostage, why are you trying to haggle with your babysitter?
It also shows the police trying to clear the building and focuses on how all the people are partying and don't want to leave. One of the cops eats some cannabis infused gummy bears. And they have some funny jokes with the daughter.
I can understand why this movie isn't very well liked. The action isn't that good. The story isn't that original. And it isn't funny enough to be considered a great comedy. So, although I acknowledge that this isn't a great movie. I don't hate it; I find it's strangeness charming.
But most will find that the lack of quality action and comedy, non-negotiable.