I could suggest names taken from opera masterworks. They sound original and funny. For example, a restaurant or snack could be named MOMUS CAFE (for the so called cafe in Puccini's LA BOHEME, where bohemians used to meet) or LILLAS PASTIA, the name of the smuggler's tavern in Bizet's CARMEN, (from this opera I took my nickname, and because I sing too, non-professionally :)).

A good book on opera libretti could be a source of ideas. Good luck -