I wouldnt charge an ebike battery in a hotel, or airbnb.
Im not extending my faith in the battery I just battered over miles if rough trails to all the families staying there.
We book places with parking close enough to put an extension out to a van , it would still be a fire, but they are diesel vans so it could be put out far more easily.
Likelyhood of it happening..miniscule.
Consequences if it did, absolutely catastrophic, not just for lives, but you in court and financially and mentally ruined if you ignored advice.
The issue here is the fundamental difference between most fires and lithium battery fires.
Your ebike battery will burn through every fire supressent method at 4000 degrees.
I can only imagine RC model enthusiasts conventions, hundreds of guests whacking 20 amps into Lipos on the hotel room desk

.
Im a doom merchant, but I wont trust rechargeables until they cant sustain their own ignition , dont steam off highly poisonous and explosive gas and burn at paper temperatures.