Crow control is the controlling a crowd, to prevent the outbreak of disorder and prevention of possible rioting. Examples are at football matches and when a sale of goods has attracted an excess of customers. It calls for gentler tactics than riot control. Materials such as stanchions, crowd control barriers, fences and decals painted on the ground can be used to direct a crowd. Keeping the crowd comfortable and relaxed is also essential, so things like awnings, cooling fans (in hot weather), and entertainment are sometimes used as well. For controlling riots and demonstrations, see riot control.