Listening to radio was a new experience in the early 1920s. Back then it was like watching TV. People would gather together and listen what's on the radio. This picture shows how it was. Classmates/friends would hangout by gathering in one place and listening radio.
1920 radio - Google 検索
Odd & Fascinating Old Photos - Part 2
Policemen inspect a “lumber truck” that smelled of alcohol during prohibition (1926)