It's not difficult to visualise this as a play with a split set comprising the apartment and bar. Garson Kanin has written some tasty screenplays both alone, as here. or with his wife, Ruth Gordon. Once you get past the fact that a bar in Manhattan never has any customers other than Kay Medford, Debbie Reynolds, and Tony Curtis, and musing how owner Jack Oakie can remain solvent, and more or less reach a tacit accommodation the the producers not to raise any awkward questions you're free to bask in the movie and wallow in the snatches of a clutch of great numbers heard over the years in Paramount films. Debbie Reynolds gets right away from her Anne of Green Gables persona and although Tony Curtis can't do much other than be himself he's not too hard to take while Jack Oakie and Kay Medford round out a solid quartet.
Review of The Rat Race
