Duck Soup is a gathering of sad and single people on a Sunday night making one last ditch effort to 'get lucky' at the weekend. Duck Soup is often
frequented by lonely cougars, and fag hags but never a hottie (unless they are there to make sport of all the losers).
This phrase was coined after the 1933 movie of the same title, directed by Leo McCarey, written by Bert Kalmar and Harry Ruby and starring the Marx brothers.
A gathering of Duck Soup is aptly named, because
Groucho Marx described Duck Soup... '"Take two turkeys, one goose, four cabbages, but no duck, and mix them together.'
In other words, all the left over or inferior crap thrown in together, but nothing exotic or tasty. thus we are in human terms left with overweight, balding, sweaty men and women, none of whom are
attractive, all trying to score each other.