I've made a decision: I'm not going to pay my temporary host.
Did they do something that violated your contract?
No, it's because of her attitude
A bad attitude is never accommodating for anyone to deal with. Paying for the lodging when you travel is normal procedure. If you don't pay then you will be held accountable and be taken to court.
I'm going to make her think I'll to pay her next month.
A host's bad attitude might be unpleasant, but hardly grounds for non-payment of a contract. You could be sued in civil court and arrested for defrauding an innkeeper. Is the satisfaction of retaliation worth all that hassle?