But then, don't you worry about the natural oils (and/or any moisturisers/conditioners), from your skin/hair, getting the bag greasy?
What you should probably do, is get paper towels/toilet paper and make a little bag nest, on the floor, instead.
Or, ideally, bring a plastic bag, or something, with you to put your bag on.
Of course, then you would need another plastic bag, to put that plastic bag in, because it will have been on the cubical floor...
So, yeah, you would need to carry around two large plastic bags, all the time.
I just saw this purse hook on Amazon and heard a lot of good reviews about it. Just ordered mine so I don’t have to do this or hugging my bag everytime I sit down because I can’t put it on the floor!