First recorded by Boffalongo (1969).
Also recorded by High Broom (1970).
Hit versions by King Harvest (first released 1970 |US #13 1972), Toploader (UK #7 2000).
From the wiki: “‘Dancing in the Moonlight’ was written in 1968 by Sherman Kelly, whose brother, Wells Kelly – King Harvest’s drummer in the early 1970s – introduced the song to the band. It was first recorded in 1969 by the American band, Boffalongo, which included Sherman Kelly (who sang lead on this original recording of his own composition) and future King Harvest frontman, Doc Robinson. The song was also recorded in 1970 in the UK by High Broom and released as a single by Island Records without any apparent chart impact.