Does anyone know if Vape smoke will set off this hotel fire alarm? : r Vaping Your guests aren't the only ones checking in. So are their vape pens. With over 13 million regular vapers in the U.S. alone, unauthorized vaping is a major operational risk for hotels. Best Vape Detector (updated for 2026) Can hotels detect vaping in rooms? Why would someone put a plastic bag over the smoke detector in a hotel