The Social Group

The Social Group is the group of friends that consist of the main cast members

Beginnings
At first there was no social group until Leonard befriended Howard and Raj

Members

 * Leonard (founder)
 * Sheldon
 * Howard
 * Raj
 * Penny (as of Pilot)
 * Bernadette (as of The Hot Troll Deviation)
 * Amy (as of The 21-second Excitation)
 * Stuart (as of The Decoupling Fluctuation)