That never crossed my mind. I have never worked in an office that didn’t allow the user of an extension cord. I can see why they would disallow them though. The hub really wouldn’t cause an issue but I could see someone trying to plug in a fridge or space heater using an undersized cord.
I believe OSHA lists five separate potential problems with extension cords: Fire hazard, tripping hazard, bypassing GFCI requirements, failure to provide surge protection, and I forget what the fifth one is. ( maybe bypassing short cord requirements for physically hot items like coffee pots?) Anyway different kinds of businesses have different kinds of safety rules for the use of extension cords . The ones for hospitals are insanely complex:
There’s like a million of both on amazon. I suggest only considering an adapter that is UL listed. Pretty sure it’s a standard 5.5x2.5mm barrel connector but I haven’t looked at it in quite a while so I might be wrong.
Then, said office should spring for an electrician to install a proper outlet at the desired location. Or, perhaps said office isn’t serious about doing things right…