My simplified take would be making an all female barbershop quartet. There are ones out there but they sound nothing like what one would expect of a form of music that most rarely listen to, if ever. I occasionally don’t mind listening to a good one but the womens ones I heard on the web don’t make me want to hear them again.
I HAVE known one girl who could sing bass - real bass, not baritone. But she was kind of a one-off, never heard another. I can sing 2nd tenor but I have to fudge the notes below C#.