Looks like Sheldon, Raj and Wolowitz were clearly too busy for their group dinner date with Penny. They have important things to do... like play Jenga!
Penny meets Raj and Wolowitz in the pilot episode of The Big Bang Theory. Wolowitz will begin his lifetime of sleazily hitting on her while Wolowitz is unable to talk to her.
Simon Helberg stars as Howard Wolowitz, a friend and co-worker of Leonard and Sheldon. Wolowitz is an engineer at Caltech and still lives with his mother.
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?