Can Hotels Detect Vaping in Rooms? Ecigator These nonsmoking hotel guests got charged smoking fees The Points Guy Can hotels detect vaping in rooms? I was reading a post from about a year ago. About the legitimacy of hotels having silent vape alarms. Well I just found one in my hotel. Discreetly attached to the back Electronic Cigarettes Undercover: 4 Ways Hotels Know You're Vaping And How To Avoid Getting Caught Volf Bar 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.