On campus, we have many different sports facilities available to us. We have basketball, squash, tennis, soccer, swimming, weight-lifting areas, and football fields to use. People use them everyday, but many times, find that these facilities are overcrowded, or in some cases, there are not enough people there to play pickup games with. For example, when some friends go to play basketball in the UC, they find that there are too little people there to start a pickup game. Or it could be the reverse and there are too many people, so they have to wait for an hour before they can play. If they knew beforehand about this information, they might have decided to pick another time or day to play, and could have saved themselves time and effort.