Avoiding intoxicants is among the vows of ISKCON initiates. It includes alcohol, recreational drugs and tobacco and, in strict traditional practice, caffeinated tea and coffee.
The devotional rationale concerns attention, self-control and clarity during chanting and study. It is a religious discipline, not a moral assessment of guests who drink coffee.
People may change habits gradually and seek support. Alcohol or drug dependence can require medical treatment; spiritual advice alone is not a substitute.
Event organisers should explain their beverage policy without collecting guests’ health histories.