Well you've been lucky and also you have not a good sense.... what for you are "good ours" for practice may be a "good our for rest" for people who will catch a plain, who have other time schedule from other country or other region....it's a hotel!I've taken my soprano to hotels a couple of times. It never occurred to me to ask for permission. I figure half an hour of practice at no louder than mf, no later than about 7.30pm, is no more antisocial than having the television on moderately loud at the same time.
It might make a difference what you play. If the walls are thin, playing tunes is probably easier for others to live with than long tones (unless you're working on subtone, perhaps) or scales.