Sound-proof it
Let’s just say you have the rotten luck of rooming next to inconsiderate guests who take the cup amplifier trick too far. All you need is to roll up one of the hotel towels and shove in under the door. That way, light and sound from the hallway won’t seep into your private room.
It might be hard to sleep in a room you’re not used to or one that has light leaki ng in from the always-bright hallway. But one of these towels should do the trick and limit the little annoyances of hotel-living. Plus, if you need extra towels, maid service is always willing to give out more.