First off , the blunt or doobie odor will be hard to hide as the smoke will be thick from the excessive cherry burning away .. Best in a ninja toker sense to use a pipe of some sort or better yet a vaporizer .. The smoke is what is going to leave the residual odors in the first place , so control the smoke and you ll be safer in the end ..
As mentioned there are several methods to go about neutralizing the odors associated with pot , incense and other methods will only cover the smell and often they mingle , not the best method but its a good one to add to the arsenal mentioned already in this thread . Ionizers , Ona Gel & Spray dispensers , Ozone makers and scrubbers all work well and have served millions well ..
Stay safe and if your not able to keep the smoke clear then keep it in a clam shell as noted , the hot shower method is my favorite as the high humidity works in ones favor . I would smoke in a room away from the main entrance as well to keep the chances of raising suspicion down ..
In my earlier smoking and growing days we had none of the options mentioned above and so we used shit like pinesol and other industrial supplies to stay safe and often we kept certain foods like sour kraut in the crock pot just for odor control lol