I know 5 long term (25+ years) smokers who succeded in quiting using this method. Its an addiction like any other. Both physical, and psycological.
If hanging out in the bar, or kicking back with a beer inspires you to lite up, then you have to avoid placing yourself into those situations which work against your willpower.
The after a meal cig, the after sex cig, and the first thing in the morning cig are the hardest ones to let go of!