Weekends, especially Sundays, often carry different programming. The countdown show, ranking the top songs of the previous week, has been a staple of weekend radio programming since 1970; current hosts of countdown shows in various formats include Rick Dees, Ryan Seacrest, Jeff Foxworthy, Kix Brooks, Bob Kingsley, Crook & Chase, Randy Jackson, Walt Love, Al Gross, Dick Bartley, and (via reruns) Casey Kasem. Other types of weekend programming include niche programming, retrospective shows and world music such as the Putumayo World Music Hour. Stations may carry shows with different genres of music such as blues or jazz. Community affairs and religious programming is often on Sunday mornings, generally one of the least listened-to periods of the week. In addition, weekend evenings are particularly specialized; a dance station might have a sponsored dance party at a local club, or a classical station may play an opera. Saturday nights are also similar to this; request shows, both local and national (e.g. Dick Bartley), are very popular on Saturday night. The longest running radio program in the country, the "Grand Ole Opry", has aired on Saturday night since its inception in 1925.