A ring on the third fingerof the left hand does NOT mean he-she is married.
My husband always kept his ring on after his wife died because he LIKED the ring.After we were married he did not get a new ring.
The same goes for a hand with out rings, he-she may be married!
Always smile, looking into the eyes of the person to whom you are meeting.
They may not turn out to be marrage material but that is what you should not be looking for. You should be looking to meeting people for fun and we all need more fun in life and could use more friends.