This screening is part of the Robert Altman season at the cinema. You can find all the details here. The film is also being shown at the cinema on January 8th.
"Initially leaving critics and audiences slightly chilled, That Cold Day in the Park marks a critical turning point for Altman as his earliest feature film to expressively and naturalistically convey the sociopsychological themes that would recur throughout his career. Sandy Dennis' lonely, wealthy, repressed Frances is the first of many Altman women who are imprisoned within cryptically prismatic emotional confines. In this case, the peculiar, nervous Frances responds by trapping a differently estranged creature in an impromptu web of dependence. Aided by atmospheric New Hollywood cinematographer Laszlo Kovacs, Altman artfully deploys mirrors, translucence, and a sensual, disorienting darkness while disclosing information in seductive, veiled increments. His audience is therefore alert and sensitive to the subtle fluctuations and power shifts within Frances’ obsessive relationship with her mysterious prisoner."
Harvard Film Archive
Here (and above) is an extract.