Waiters, waitresses and restaurant personnel appearing on the show.
Bernadette (former) worked at The Cheesecake Factory.
[1 Mimi Gianopulos as Trina in The Plagiarism Schism who waits on Howard at The Cheesecake Factory when he wants to know which waitress besides Bernadette had a crush on him. This scene did not make the final episode edit, though Trina was the last of a long line of Cheesecake Factory waitresses that began with Penny.
In The Change Constant Sheldon and Penny visit The Cheesecake Factory bar where they discuss how far they have come with Penny starting as a bartender in that very restaurant. Sheldon has visibly pissed off the current bartender who was the last of a long line of Cheesecake Factory bartenders that began with Penny.