OK the aliens themselves didn't disco but their outfits looked as if they belonged in a sci-fi disco-tech and some of the earthlings wearing peplum outfits danced a tribal disco complete with disco music! Yes this film is laughable, awful, yet entertaining in very weird way. OH and how can you not like Lord Glitterbeard! That was too funny.
Basically, Lord Glitterbeard (or what's his name) is out to get the 2 aliens. The 2 aliens land on earth to hide from him but learn love from some peplum wearing earthlings who's leader claims that they are the last of their kind. The two aliens end up falling in-love and they don't care that they will no longer be immortal because they will know the joys of life and love plus they can catch virus, disease and such - they feel that love is worth the risk.
Terrible movie but kinda fun to watch in an odd way.
4/10