And I finally found out during a visit to Old Penny Memories, a working collection of antique slot machines in Bridlington. The images weren't anything that your Sun reader doesn't see every day of the week nowadays, with one featuring a partially clothed lady swimming around in a river.
Admission is free.
You just buy a handful of huge old British pennies when you enter and then use them to work the machines. Below the arcade, you can enjoy a nostalgic drink and eat in a Sixties-style coffee bar. Just a couple of hundred yards from Old Penny Memories, we visited another larger museum giving visitors a chance to sample the sights and sounds of Bridlington's history as a seaside resort. This also has a room of old-fashioned amusement machines. But there are also tableaux from different eras, including holidaymakers at breakfast time in a Fifties boarding house and then the same trippers enjoying a cup of tea in a beachside bathing hut.