fringe church

noun2

1. •
   (informal, disapproving) A Christian denomination espousing doctrines or worship customs rejected by the majority of Christians.

   • Millions of people attend fringe church affiliated worship services each day.
2. •
   (informal, disapproving) A place of worship affiliated with this type of religious denomination.

   • Congregants drove to attend services at a fringe church on Sunday morning.