The ring is a pretty cheap "promise ring" type stud. I wear it in my right hand most of the time.
That finger is easily and discreetly changed to the left hand when I need and want to be left alone.
Tonight was one of those nights. Drunk dude approached. I wasn't 100% sure he had all his teeth. It is Oklahoma and we are pretty close to Arkansas.
He introduced himself. As he did I swapped that ring on my "taken" finger real fast.
I wasn't bothered the rest of the night.
Girls. It is a good investment. Doesn't have to be fancy to send a message.