How do you smoke in hotel room?

Smoking in a hotel room not only violates almost all the regulations for hotel stays, but also may trigger smoke alarms, result in hefty cleaning fines, and even lead to legal liability. Therefore, the most direct and responsible response is: Please do not smoke in the hotel room.
If you do have a need for smoking, a more appropriate approach would be:
Reserving a smoking room: When making a reservation, confirm whether the hotel offers smoking rooms. Currently, most hotels have implemented a complete smoking ban, so such rooms are becoming increasingly rare. However, they still exist in certain areas or specific hotels.
Head to the designated smoking area: Almost all hotels will have smoking areas set up outside the building or in separate ventilation areas. You can directly ask the front desk when checking in.
Go outside or to the balcony: If your room has a balcony, you can smoke on the balcony and close the doors and windows behind you. However, be aware that many hotels also prohibit smoking on balconies because smoke may still drift into other rooms or trigger alarms.
If you are still curious about "how to cover up the traces" - please be aware of the risks
On the internet, you might come across some "tricks", such as blocking the door gap with a wet towel, turning on the hot water in the shower to create steam, using an air purifier or a straw to blow the smoke out of the window. But almost all of these methods are unreliable and can lead to serious consequences:
Risk Explanation
Smoke detector Modern hotel rooms are generally equipped with highly sensitive photoelectric or ion smoke detectors. Even electronic cigarettes or low-tar cigarettes produce enough aerosol or smoke to trigger the alarm, causing an evacuation of the entire floor. You will bear the cost of the fire response.
Odor residue Smoke will seep into curtains, carpets, mattresses, and air conditioning filters. Even after ventilation all night, professional ozone treatment or residue detection can still detect it. Many hotels have already used electronic odor detectors, and you can know the result after checking at check-out.
High fines The fine amount usually starts at $200 - $500, and for high-end hotels, it can reach over $2,000. This fee will be directly charged to your credit card, and the chance of disputing it is extremely low.
Blacklist inclusion Large chain hotels (such as Marriott, Hilton, InterContinental) share "bad guest" lists. Once recorded for smoking, you may not be able to book any hotel under this group in the future.
One exception: Electronic cigarettes or marijuana
Electronic cigarettes: Although the smoke produced is relatively thin, many hotels have clearly included electronic cigarettes in the no-smoking area. Some highly sensitive detectors can still detect the propylene glycol aerosol produced by electronic cigarettes.
Marijuana: Even in regions where marijuana is legal, the vast majority of hotels still prohibit smoking marijuana in guest rooms. This is because the smell is extremely strong and lasts for a long time, making it more likely to result in complaints and fines.
Summary of Suggestions
If you do need to smoke, the safest, most cost-effective and most respectful approach is to walk out of the hotel and smoke outdoors. A short walk can prevent fines of several hundred dollars, disputes with hotel management, and the impact on the health of the next guest.
If you are concerned about the inconvenience of smoking outdoors, you can call the hotel in advance to inquire about the smoking policy. Some hotels will provide free portable ashtrays or inform you of the nearest smoking areas.
For your own safety and that of others, please do not smoke in the hotel room.