You can reduce it significantly, but some flavor will linger for a few hours
No time is ever the right time, but by setting a quit date that allows you to avoid the stressors, people or behaviours that normally tempt you into having a cigarette, you will maximise your chances of success
The study also finds that national menthol bans appear more effective than local or state menthol bans, as quit rates were higher in places with country-wide bans
(Do note that While it can be hard to quit smoking, it can be worth it in the long run (do note that you shouldnt just substitute it with vaping since vaping can cause acne, too!) There are plenty of resources out there so you dont have to do it alone, including support groups and OTC and prescription medications
Each business is allowed to determine whether or not they allow cigarettes within their facilities