Frasier's first idea for the name of the restaurant is Maison Crane, pronouncing the "n" at the end of Maison. Since Frasier spoke fluent French to a Belgian chocolatier on Cheers, he would know a consonant at the end of a French word is not pronounced, unless it is followed by a vowel.
After Martin has replaced the bartender, he playfully asks Frasier, "Hey buddy. You from around here? How 'bout those Supersonics?" The Supersonics were Seattle's NBA team and were known informally as "the Sonics." A true fan would have referred to them as such.