Amazon Women in the Mood
The episode's title comes from the movie Amazon Women on the Moon. At the space restaurant, Zapp sings "Lola" to Leela. This a parody of William Shatner trying to sing "Rocket Man."  The bar "Le'Palm d'Orbit" is a reference to "Palme d'Or." Zapp calls himself "the Velour Fog" because sing Mel Torme's nickname is "the Velvet Fog."