Best way to protect a section of the site with one password

Is there a plugin that simply protects a section of the site with one password?

It's a members area but they want to keep it simple so everyone uses the same password to open up a hidden section.

I thought I could perhaps just use the built-in WordPress password protect feature on the Edit page screen, each page with the same password, but I think this would mean they would have to retype the password each time they move to a new page, wouldn't they?

Any tips welcomed
best wishes