TV One’s hit show “Unsung” has gained a following by showcasing beloved acts of the past few decades that haven’t gotten their just due. In the latest episode, “Feeding Disco Fever, ” airing Wednesday, February 20 at 10 p.m., disco and the people who created it are the focus on a two-hour show dedicated to the popular dance music that dominated the 70’s. It’s a good time to do it. Two of disco’s most dynamic performers – Donna Summer and The Bee Gee’s Robin Gibb both died last year. Disco, which lived and died in the excesses of the 70’s through clubs like New York City’s famed Studio 54, was one of the first genres to embrace a diverse group of fans.