You’re right, Lois. I was very fortunate that the one close to me was essentially entirely atheistic/humanistic. The only relationship it had to religion was the sign out front that called it a church. The reason was to assure that member donations could be listed on their income taxes as deductions.
Never any hymns - rather, folk songs. Never any prayers - rather comment period where people could insult the minister for his pre-feminist attitudes, etc. Very early acceptance of gays, and even a transgender person as church secretary.
At first, they had other U. ministers for summer sermons, but they were usually religious so we switched to having AHA speakers, local college instructors, politicians, etc. to avoid them wasting our time with theology.