What country are you in?
In the US they rarely have anything on anymore. I saw one this year on WE (Women's Entertainment, a digital cable and/or satellite channel, and it came on at 3:00am) and last year there was one on Lifetime (another cable/satellite channel). GoodTV network (a regional cable/satellite channel in the southeastern US) used to have them. Sometimes PBS runs old episodes of Championship Ballroom Dancing, but it depends on the local station. A new Championship Ballroom Dancing hasn't been made since 2000.