Roz complains that she looks like Divine. Divine is the stage name of actor Harris Glenn Milstead, a well-known drag queen who became famous appearing in John Waters films of the 1970s and 80s.
In this episode we learn that Bulldog (Dan Butler) was raised and educated as a Roman Catholic when Frasier (Kelsey Grammer) introduces his boyhood priest and confessor.
Frasier says Bulldog was offered lifetime supply of muffins by the shop owner. This suggest that one of the male members of staff is the owner. However later in series in S10E20 Farewell Nervosa the owner is introduced as Maureen Nervosa.
Bulldog's apartment number is shown to be 333, which could represent his initials, BBB (Bob Bulldog Brisco).