Costco was the worst for me. I told them that as a member since 1988, I joined Sam’s club because they didn’t require masks. And that is exactly what I did last December. Sure, Sam’s had the sign up, but they didn’t enforce it at all.
My boy went into a Utah Sam's Club without a mask. The state went maskless a few weeks ago, but some stores still mandated it. I think he said that Sam's was "optional".
He spoke to a maskless employee behind the Deli counter and congratulated him, saying he was SO tired of all the B/S. The guy agreed, saying it was nice to see peoples' smiles again.