S01E07
-Sheldon:Yes. 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:Oh, 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:You go dancing every Wednesday?
-Penny:No.
-Sheldon:Then that's not "dancing night."
-Penny:Look, why don't I play with you guys tomorrow?
-Sheldon:Tonight is Halo night. It's like talking to a wall.
-Penny:All right, now, Sheldon, you and I are about to have a problem.
-Leonard:Sheldon, remember, we role-played this.
-Sheldon:but you didn't portray her as completely irrational.
-Penny:All right, fellas, I gotta go. But good luck.
-Leonard:Maybe we should've asked if we could go dancing with her and her girlfriend.
-Sheldon:Okay, assuming we could dance-- which we can't--there are three of us and two of them.
-Leonard:So?
-Sheldon:It's the Chinese restaurant all over again. I assure you that cutting a dumpling in thirds is child's play compared with three men each attempting to dance with 67% of a woman.
-Leonard:For God's sakes, Sheldon, you're driving me crazy!
-Sheldon:Your anger is not with me, sir, but with basic mathematics.
-Leonard:No. I'm pretty sure my anger is with you.
-Raj:What's happening to us? We're falling apart.