Raj and Sheldon get into an argument when Raj is out on his blind date. Guess who she goes home with?
Penny uses Raj and the guys as her test subjects as she practices making drinks. Here's a pic of her getting Raj liquored up.
Penny practices bar tending on the boys in order to learn up for her new job that will help earn her some extra cash.
Raj gets extremely nervous and anxious after his parents set him up for a blind date with a girl from his childhood.

The Big Bang Theory Season 1 Episode 8 Quotes

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?

Leonard: Do you really need the Honorary Justice League of America Membership card?
Sheldon: It's been in every wallet I owned since I was five.
Leonard: Why?
Sheldon: It says keep this on your person at all times. It's right here under Batman's signature.