A devotee is a member of a religious group. Monks shave their heads, as do devotees of the Hare Krishna movement.
One of the paradoxical issues facing people with disabilities are "devotees": temporarily able-bodied people who are attracted to them because of their disabilities.
Devotee is a fancy word for "fan." Some people are superfans of Katy Perry. Others save their love and adoration for Mozart. Either way, they are huge devotees of the musicians they love.
The nightclub is popular among jazz devotees. She is a devotee of Italian cooking.