We still are using those plug clusters and other such things to plug appliances into lightbulb fittings. Sold in every hardware store (and a lot of dollar-stores also!).
And that's something that always amazes me! Of course we have had that stuff too, but it disappeared from the stores around 1960! No way you could sell something like that today! I guess it could end the store owner in jail. Haven't even seen an old one really used in my 20 year life... apart from the one I had as a kid and used to power my cassette recorder from the desk lamp (my desk only had one ungrounded socket next to it, one of the few my dad hadn't rewired because they already had PVC wire, so I was pretty glad I had two additional ungrounded sockets...) but even as a 6-year-old I took great care the bulb wouldn't burn the cord!
