chez

In French, when you talk about going to someone's house or place, you use "chez".

Examples:

• Je vais chez Paul.
  I’m going to Paul’s house.

• Nous sommes chez le médecin.
  We are at the doctor’s (office).

• Elle reste chez elle.
  She’s staying at her place (at home).

So:

English	French
at Paul's house	chez Paul
at the dentist's	chez le dentiste
at my place/home	chez moi
at her place	chez elle

Let me know if you want a full mini-guide on "chez" in different contexts!