Along with featuring James Belushi as Danny's friend and colleague Bernie Litko, the film also marks the screen debuts of Elizabeth Perkins and Catherine Keener.

[4] In Chicago, Daniel "Dan" Martin and Bernard "Bernie" Litko, two friends and colleagues in their twenties, discuss their sexual escapades.

Attending this game with her girlfriends is Deborah "Debbie" Sullivan, who works at the advertising company and is having an affair with her boss, Steve Carlson.

They experience much throughout their relationship: Dan being contacted by a former lover who is married with children, Debbie's boss Steve having difficulty accepting the end of their affair, Joan softening when she begins dating her new boyfriend Gary, a pregnancy scare, and Dan clashing with his boss, who orders him to stop providing supplies to the Swallow, an antiquated diner owned by his client-turned-friend Gus, due to late payments.

It reaches a boiling point at a New Year's Eve party at Mother's, where Debbie witnesses a drunken Pat making advances towards Dan, and Joan discovers her boyfriend is married and returning to his wife.

When they run into each other at a St. Patrick's Day celebration at Mother's, Dan tells Debbie he made a mistake and still loves her; she insists she has moved on and their relationship is over.

The website's critics consensus reads, "About Last Night will perturb fans of the original stage play by sanding down its pricklier edges, but an amiable cast and sexual frankness make this a pleasantly grounded romantic comedy.

"[11] The lead performances were especially praised, with Ebert writing, "Lowe and Moore, members of Hollywood's 'Brat Pack,' are survivors of last summer's awful movie about yuppie singles, St. Elmo's Fire.

When it comes to the current sexual skirmishes between men and women, screenwriters Tim Kazurinsky and Denise DeClue [...] know every inch of enemy territory and take no prisoners.

"[12] Vincent Canby of The New York Times gave it a mixed review, calling it "an occasionally bright, knowing look at the same singles scene that's been explored no less effectively by a number of other, very similar movies".