Coffee is discouraged for some people on the spiritual path, but this is a complex issue with many factors to decide whether or not it is right for you. Caffeine can shrink your pineal gland and cause you issues sleeping. On the other hand, spirits and ghosts use the substance to empower themselves to interact with the land of the living and even move objects despite not having a physical body. Most people drink it out of addiction or to give themselves energy to work mundane jobs and live mundane lives, but the drink has more potential than we actually think.
Obviously most spiritual people tell you not to drink coffee, because of the pineal gland and how it is affected. This is valid, but those who are more adept can actually drink a cup of coffee and have it empower their thetan. Energy from caffeine can actually be spiritually directed towards goals or different energy centers in your aura. You may feel like you have died or you may feel like a ghost and your own aura may overwhelm you, but this is actually good for you spiritually.
Aside from being addicted, you definitely can benefit from coffee if you would like. Ascetic people may choose to abstain or have smaller amounts, and there are various pros and cons to both, but you should probably consider whether it is conducive to your personal goals as a Lavenderist.
To see if it is right for you, try drinking some with intent. Say “This coffee will empower me” or “This coffee will open my third eye.” Your body and aura will both respond to it, and you will know then if it is right for you.