So having access to a separate but equal Civil Marriage was actually constitutional then.
Who's side are you on?
Can you stay focused for more than 2 seconds? You said some were being discriminated against. When it's pointed out to you that's false since no one is being discriminated against, you shift to separate but equal.
Meanwhile, there remains no discrimination in your silly example. Everyone has access to those same locker rooms regardless of their race, religion, gender, or sexual preference.
And again, compare that to SSM, where until recently, gays were denied access to their right to marry the person they love.