The New York City Board of Education allows community groups, including religious ones, to use its buildings. But it excludes worship services.
A federal appeals court upheld the policy in June. The Supreme Court is considering whether to review the case and could decide that on Monday.
Robert Hall, co-pastor of the evangelical Bronx Household of Faith, says his little group never expected to get involved in a big-time court case that has now lasted 17 years.
The church's lawyer says the ruling makes an arbitrary distinction between religious expression and worship. But a civil liberties group says it preserves separation of church and state.