tv/ movies: Ron Howard's directed his first film in 1977. What was it called?

Questions

An RandB song which catalogues many dance moves of the day?

David Bowie requests this in his 1983 hit album?

David Hidalgo, Conrad Lozano, Cesar Rosas, Louie Perez and Steve Berlin?

Medieval instrument bearing some resemblance to a mandolin?

Pete Townshends suggestion in a popular song of his (hint: lmlotd)?