The first of five Looney Tunes shorts composed by Eugene Poddany instead of Carl W. Stalling; Stalling was recovering from a head injury during this time.
The Spinsters Arms Hotel has as its slogan 'Baby it's cold inside' - a play on the Frank Loesser song 'Baby It's Cold Outside', popularized in the movie Neptune's Daughter (1949).
Tweety actually sings like a bird, and Sylvester actually meows like a cat...in the first couple of frames, that is.
Tweety refers to himself by name as he sings a variation of the popular song from 1900, A Bird in a Gilded Cage.
The title is a play on the term 'room-and-board'.