Can police hold you at a house party unless you take a breathalyzer?

Police cannot legally hold you at a house party without probable cause or a warrant. If they have reasonable suspicion that you are intoxicated, they may request a breathalyzer test, but you have the right to refuse. However, refusing a breathalyzer can lead to legal consequences, such as a license suspension, depending on local laws. It's important to know your rights and the specific regulations in your jurisdiction.