So we'd stay as cheap as possible. Double, triple, quadruple up on rooms. Sleeping bag on the floor, scheduling who showers when. Learned the trick of laying a line of luggage down the middle of the bed, so if you accidentally snuggle up to something in the middle of the night, it's just a duffel bag.
I think per diem was in the $60-70/night range at the time, I don't recall exactly. But I know after a few months of working out of town, I was suddenly able to afford my next car without a loan.
But if the company tried to _require_ that? Oh, hell no. Heeeeelllllll no.
Sharing a freaking bed as an adult? Top-and-tail with a random colleague who may be in a relationship? What if they put you in a bed with someone you know has a crush on you? Or who has hygiene issues? Or who snores? No it absolutely isn’t accepted at work, unless France is completely different for professional and personal standards to the rest of the developed world. No functional HR organisation would accept the risk. Where would they stand if the other person touched you in the night and claimed they were asleep?
And this is a bank, not wilderness work or the Army.
Our conferences always book double rooms and they are shared. Never a complaint as far as I know. BUT, our conferences are 100% optional, so you do not need to attend. Just saying that this "sharing bed" thing is not that unusual.
This is a IT consultants firm, btw.