Big Bang Theory Quote
Sheldon: Penny, we would very much appreciate it if you would be the fourth member of our Halo team. I don't think I need to tell you what an honor this is.
Penny: Aww, that's so sweet but I'm going out dancing with a girlfriend.
Sheldon: You can't go out, it's Halo night.
Penny: Well, for Penny it's dancing night.
Sheldon: Do you go dancing every Wednesday?
Penny: No.
Sheldon: Then it's not dancing night.
Quote from S01E07 - The Dumpling Paradox