It’s Pentecost. Wear red and write about a Pentecostal church.
Mt. Zion Pentecostal Church was and still is at 1112 N St NW. It was a tiny church in 1957, with just 70 members. It was and still is an African American church.
They did not provide any information about the professional make up of the congregation. But they did say that most of the membership lived outside of the Northwest Urban Renewal Area in other parts of the District of Columbia.