There are "cane swords' XD I really don't know what they are called, but anyways you hide a blade inside a walking stick or cane, kind of like Yoda from Star Wars. I found a baseball sword here: https://www.amazon.com/RealFireNSte...d=1&keywords=cane+sword&qid=1613549157&sr=8-3
I think the concept of the fan as a weapon was to take an everyday object that was routinely carried to use as a weapon.
But that is from another era and culture and you would certainly raise more than a few eyebrows walking around with it, and come to think of it, might actually cause you to get in fights.
If you want an everyday object you can carry that would double as an effective self defense weapon, I would say you're better off with a cane.