A contract rider is the part of the contract that specifies what the promoter must provide a band on the day of a gig. There are all kinds of stories about contract riders: the items the promoter must supply to the artist backstage before and after a concert.
The group Danzig once insisted on having ten attractive women between the ages of 18 and 24 who were well-versed in politics, religion and sports and who lived no further that a 5 dollar cab ride from the venue.
At the other end of the scale, here is what Morrissey demanded when the Smiths were touring in 1985: salt and vinegar chips, a bottle of red wine, corn flakes, cocoa puffs or Special K, a pint of milk, two green apples, a packet of cashews, cheese sandwiches and a cupcake.