Can You Vape in Hotel Room? What You Need to Know Mr Fog Enjoy To The Last Puff Can Hotels Tell If You Vape? LOOKAH How Do Hotels Know If You Vape In Your Room UPENDS 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.