Dear Subeta, How will the younger generation learn about cassette's and cassette players or walkman's if there are none on site? Shame on you! I mean there are Mp3 players but no cassette's players.
My suggestion is make them so we can relive our old days with a beloved cassette players which we could use to record music on time or just play when we would walk (and turn a pencil in your cassette if it suddenly started stuttering).

For those who do not know how they look like 1 and 2
They could be great wearables and TC items! Maybe add also those funky looking big radio's on the shoulder of a HA like these
Come to think of it, we have + various more book tapes, but no cassette players! :(
We even have record players, VCRs, an old-timey TV and radio, but no Walkman with a Subeta twist. Or a proper boombox, like you've said. IMEAN if we can have floppy disks, we can have a boombox (or five) and a couple of cassette players.
👍 More.
Oh, yes! I have personally got fond memories of radiocassettes, and these thinnies make me feel nostalgic about them! So I really support this suggestion, yes! :)
Secret Crush Mixtape should totally be a (readable) Cinthia Quest Shop item. Self Destructing Tape from Maleria. Last Will and Testament tape for Carl sent to him by an attorney from an aunt twice removed that he has kept and is heir too but can't actually play back to make the claim. Unearthed Unearthly Sounds by Quentin.