You can have a museum for anything these days, and perhaps that is just as well or some wonderful things would be forever lost. On the sea front at Brighton I found a small museum specialising in penny slot machines. Some of them I recognised from when I was a kid, but many of them were much older.
For example, the museum has a couple of examples of the hand-cranked pornographic movie machines generally known as, "What the Butler saw". These being seaside machines, the pictures are of a young lady getting ready to bathe rather than getting ready for bed, but otherwise the idea is the same.
In a completely different vein, there is a pinball table dating from 1933. It is so old that it really does have pins on it, just like the old bagatelle boards from which pinball was derived. There are also fortune telling machines, and a very primitive table ice hockey game.
One rare item is a Victory V Allwins machine. An Allwins is a type of slot machine in which the player shoots a ball upwards and watches it fall past a collection of cups. If it falls into a cup early on it wins a prize, but if it falls to the bottom it loses. This particular machine was made during WWII. The winning cups are arranged in Churchill's famous V and are labelled with the flags of the Allies. The losing cup is decorated with German and Japanese flags.
Most of the machine still work and you can play them. The trouble is that you need old-fashioned pennies. You can buy them at the museum, but the exchange rate isn't too good. I'm sure that when I was in school 50p converted to rather more than 7d. Still, who cares as long as it keeps this lovely little museum in business?