Do Wedding Planning companies usually have a team base? If so, do you know of any in the LA County, San Bernardino County or Riverside County??

Movies like the Wedding Planner (one of my favorites!) imply that WP companies do have a physical building for the team to meet up, but I just wanted clarity about that. I am on the lookout for some local Wedding Planning firms that I can contact about an internship. I just need to know where they are...thank you!