A perscription, schedule III, narcotic analgestic (pain killer) containing hydrocodone and acetaminophen (Tylenol). Hydrocodone is actually an opiate, like heroin, that gives an amazing euphoric body high but it's also very addictive (although not nearly as addictive as heroin).
Unlike basketball and football, there is no way of knowing how long a game of volleyball will be. Like the others have already said, whoever wins the first 3 out of 5 sets wins the game. How long that can take can be anywhere from 30 minutes to 2 hours. (I've played in both).
Scorekeeping volleyball step by step instructions. Arrive at least 15 minutes prior to the match start time. If you are playing the match before your work assignment, check in with the referee at the conclusion of your match. Let him or her know you will be keeping score for the next match.