This particular clip is from Italian Tv and since i can't speak Italian I have no idea of the context beyond what I can deduce..
1. This seems to be some sort of competition. Year seems to be 1980.
2. The participants are taking it seriously (although it may be a pro-style "Work")
3. There's some definite needle her. Nobody is rolling around and giggling.
4. The participants are hot, in shape and wearing sexy outfits. Nice.
Check it out for yourselves.