The Saturday Night Fever line dance is still around - it shows itself at the dance studio I attend occasionally. I think the version I know is a little different from the one referenced in the first post. It does have the chicken wing flapping though.
Line dances are great fun! They're an opportunity to show your originality playing around with the steps. Plus, they gets folks out on the dance floor who might otherwise not be out there. It especially helps break things up on a slow dance night.
When I started dancing in 1978 there were two dances with similar names. This was either the Manhattan Bus Stop or the Brooklyn Bus Stop. One of these was the Night Fever dance and the other was an older dance which started side step, close, side step close.