You cannot legally stream movies in public unless you have permission and a license from the copyright owner to stream the movies.
However if you were just gonna stream a movie you paid for such as at a family event in public then it would likely be okay.
But if you're having a large event with non family and you stream those movies whether you charge for it or not you could get into trouble if someone reports you.
If you're simply watching a stream of unlicensed content, you're not technically breaking the law.
Where it becomes a crime is if you download the movie or show or host a stream yourself.
The PLSA law is going after the big fish – the services that stream pirated content.
If you are showing TV programs or movies in a public space, then you need a Public Performance License on top of your TV License or TV subscription.
This applies to shops, restaurants, bars, hotels, clubs, dentist offices, car showrooms, and even semi-public spaces like membership clubs, employee break rooms, or gyms.
Copyright holders can sue individuals who watch copyrighted content on illegal streaming websites, but the likelihood of being sued as a viewer is relatively low compared to those who upload or distribute copyrighted material.