It's so rare for regular players to have a ref present. We play league and it's just you and your opponent. So, some players after they missed hitting good for the second time their opponent tells them as he/ she is walking up to the table "your on two". Then the player hits safe again and say nothing as they return to the table to shoot the third time... they figure they already told them...I heard the proper etiquette is to not say anything until you finish your 3rd safe shot and they are walking up to the table to attempt hitting the 3rd time.
