I grew up with listening booths from the late 1950s till at least the end of the 60s.
The photo above was taken in the basement sales floor of HMV Oxford Street, London which, although living in the north of England, I visited occasionally.
There was often conflict with shopkeepers as to how much you could hear before deciding whether to buy. They wanted a sale and often insisted on playing one track only; many punters wanted to assess the record as a whole, as a record costing say £2 took a big chunk out of available cash in those days.
Blue Note's practice of headlining a generally attractive track sometimes with a boogaloo rhythm at the beginning of Side 1 was probably influenced by shopkeepers' playing policies, but of course it could lead to misleading the customer into thinking he was getting a dance record!
Miles Ahead was a good one for defeating shopkeepers, as there's no real break between tracks.