This is part of the Luis Bunuel season at the ICA. Full details here.
Chicago Reader review:
Luis Buñuel's 1962 film takes an old Mexican proverb—"After 24 hours, corpses and guests smell bad"—and turns it into a marvelous satire on the life of the bourgeoisie. Augusto Benedico gives a sumptuous party, but when the guests try to leave, they discover they're unable to step across the threshold of the music room. They stay on for days, finally reduced to eating a stray sheep that wanders providentially through the house; and when at last they escape and go to church to celebrate their deliverance, the whole thing starts again. Essential viewing. With Silvia Pinal, Enrique Rambal, and Jacqueline Andere.
Here (and above) is the trailer.