Time Waster
Guru
Inthe 70's my school had racks for at least a 100 bikes.
And they were popular places round the back too. We just hung out in then when it was raining.
Oir school had one end of the playground with a building that was open at the front it was the bike shed. Iirc it had a big, wooden rack against the back wall. It was a large frame with vertical wooden bars at regular gaps for you to stick your wheel in. No nobody locked bikes back then.
My high school had no bike racks at all. Everyone there got to school by school bus or parents car. Later on at that school some also came in their own cars. The way things were to go I reckon. Still most took the buses like at my lads school but they come from 30 odd miles away so unlikely to get active travel that far.