Betws-y-Coed Wireless Hall

I spotted this in a Betws-y-Coed chip shop on the way back from the Ogwen valley recently. Google isn't helping much with any information about it. Is a wireless hall somewhere where events are held and broadcast by wireless? Or did it have wireless receiving equipment before the wireless had made it into the average home? There must be some analogy to be drawn with the wireless hall as part of a community wireless network of a past era.