bind sharepoint list to asp repeater

I'm trying to create a visual web part that pulls data from a custom list and show the data in a asp repeater and show the items grouped as well.  In the list I have a column named location that allows the user to select the office location,

I'm looking for this kind of results if possible

New York City
       office 1
       office 2
       office 3

Los Angeles
      office 1
      office 2
      office 3

Seattle
    office 1
    office 2
    office 3